SC-04-08 Richard Cabot posted an update in the group SC-04-08 3 weeks ago No folders found. Please create and select folder. Documents Folder Title Following special characters are not supported: \ / ? % * : | " < > Privacy Public All Members My Connections Only Me Cancel Create 000294.html 6 KB HTML - Click to view Options Copy Download Link [SC-04-08] - Warsaw pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] - Warsaw david murphy dmurphy at krix.com.au Mon Apr 27 00:42:32 EDT 2015 Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Hi all, I will not be in Warsaw, but intend to be at AES NY. I hope you have a productive meeting. warm regards from Down Under David David Murphy Loudspeaker Design Engineer Commercial Cinema Krix 14 Chapman Road | Hackham SA 5163 | Australia T +618 83843433 | F +618 83843419 Email: dmurphy at krix.com | Web: www.krix.com DISCLAIMER: This email and any files transmitted with it are confidential to the intended recipient and may be privileged. If you are not the intended recipient, please notify Krix immediately. Whilst we have used software to alert us to the presence of computer viruses, we cannot guarantee that this email and any files transmitted with it are free from them. ________________________________________ From: SC-04-08 [sc-04-08-bounces at standards.aes.org] On Behalf Of Eddy B. Brixen [ebb at ebb-consult.com] Sent: Wednesday, 22 April 2015 12:47 AM To: 'Working group on Measurement and equalization of sound systems in rooms' Subject: Re: [SC-04-08] - Warsaw Hi Brian, I'll chair the meeting in Warsaw. Cheers Eddy Eddy B. Brixen consultant -----Original Message----- From: SC-04-08 [mailto:sc-04-08-bounces at standards.aes.org] On Behalf Of Brian McCarty Sent: 21. april 2015 15:25 To: Bruce Olson; sc-04-08 at standards.aes.org Cc: Andres Mayo; Francis Rumsey Subject: [SC-04-08] - Warsaw There has no agenda been posted for SC-04-08 in Warsaw. Has a new chair been named? Who’s managing the meeting in Warsaw? Brian McCarty _______________________________________________ SC-04-08 mailing list SC-04-08 at standards.aes.org <http://cp.mcafee.com/d/FZsS739J5xcQsK9CzBxNUTsSzssCqen7TXL6QrzAPhOU-VtYSzssCqen7TXCzASzssOCqenQT4Pq2Hslypo55oO3-nXmPpmcw_B-RISqektsspvvW_9Icf8CzDHTbFIEFY-MyOUZR4nRHFGThpVkffGhBrwqrhdFCXYyUqenAkmkXL6XCM0t9X13oEkXvFM07amWPGF8d3zzhOyrFoLtwLtUKgGT2TQ1l9X13oEkXvFM04SOMMyr1vF6y0QJz0AnKMnKYqnjh0nd402X6CC3qr9KSLZyXsL> _______________________________________________ SC-04-08 mailing list SC-04-08 at standards.aes.org <http://cp.mcafee.com/d/2DRPoQ86Qm4PhOUCqem77ztPqdNOpEVsvvKYrhKejd7bzXBTPqdNOpEVsvvKqejqdNPapEVvjsjdEaJNm9Bwklz8fVvJrdBoO3-nXmPpEVhRNNBZ_HYCMMYyqeuLsKCOyDPX2bbzTkhvmKCHt5DBgY-F6lK1FJcSCrLObxEVuhhpjKYrKr01QDI4dyxjJ-D00sFrHeGAwQeed7a9KByZS2ZTyV2Hsbvg5kDI4dyxjJ-D00jrb329I5-Aq83iSc2huX1uXNFtd41sQg0bIqqodFICRcggLw7b> Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the SC-04-08 mailing list Expand 000295.html 7 KB HTML - Click to view Options Copy Download Link [SC-04-08] - Warsaw pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] - Warsaw philip newell philiprnewell at gmail.com Mon Apr 27 11:31:21 EDT 2015 Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Quite incredibly, I cannot get from Vigo (Spain) to Warsaw and back (on the 6th and 11th) within single days of travelling there and back. It can only be done with an overnight stay, en route, in one direction and 14 hours of travelling in the other direction with a need to get to an airport by 4.30 am. It is all out of the question. Best wishes, Philip On 27 April 2015 at 06:42, david murphy <dmurphy at krix.com.au> wrote: > Hi all, > I will not be in Warsaw, but intend to be at AES NY. > I hope you have a productive meeting. > warm regards from Down Under > David > > David Murphy > Loudspeaker Design Engineer > Commercial Cinema > > Krix > 14 Chapman Road | Hackham SA 5163 | Australia > T +618 83843433 | F +618 83843419 > Email: dmurphy at krix.com | Web: www.krix.com > > > > DISCLAIMER: > This email and any files transmitted with it are confidential to the > intended recipient and may be privileged. If you are not the intended > recipient, please notify Krix immediately. Whilst we have used software to > alert us to the presence of computer viruses, we cannot guarantee that this > email and any files transmitted with it are free from them. > ________________________________________ > From: SC-04-08 [sc-04-08-bounces at standards.aes.org] On Behalf Of Eddy B. > Brixen [ebb at ebb-consult.com] > Sent: Wednesday, 22 April 2015 12:47 AM > To: 'Working group on Measurement and equalization of sound systems > in rooms' > Subject: Re: [SC-04-08] - Warsaw > > Hi Brian, > I'll chair the meeting in Warsaw. > Cheers > Eddy > > Eddy B. Brixen > consultant > > -----Original Message----- > From: SC-04-08 [mailto:sc-04-08-bounces at standards.aes.org] On Behalf Of > Brian McCarty > Sent: 21. april 2015 15:25 > To: Bruce Olson; sc-04-08 at standards.aes.org > Cc: Andres Mayo; Francis Rumsey > Subject: [SC-04-08] - Warsaw > > There has no agenda been posted for SC-04-08 in Warsaw. > > Has a new chair been named? > Who’s managing the meeting in Warsaw? > > > Brian McCarty > > > > > _______________________________________________ > SC-04-08 mailing list > SC-04-08 at standards.aes.org > < > http://cp.mcafee.com/d/FZsS739J5xcQsK9CzBxNUTsSzssCqen7TXL6QrzAPhOU-VtYSzssCqen7TXCzASzssOCqenQT4Pq2Hslypo55oO3-nXmPpmcw_B-RISqektsspvvW_9Icf8CzDHTbFIEFY-MyOUZR4nRHFGThpVkffGhBrwqrhdFCXYyUqenAkmkXL6XCM0t9X13oEkXvFM07amWPGF8d3zzhOyrFoLtwLtUKgGT2TQ1l9X13oEkXvFM04SOMMyr1vF6y0QJz0AnKMnKYqnjh0nd402X6CC3qr9KSLZyXsL > > > > _______________________________________________ > SC-04-08 mailing list > SC-04-08 at standards.aes.org > < > http://cp.mcafee.com/d/2DRPoQ86Qm4PhOUCqem77ztPqdNOpEVsvvKYrhKejd7bzXBTPqdNOpEVsvvKqejqdNPapEVvjsjdEaJNm9Bwklz8fVvJrdBoO3-nXmPpEVhRNNBZ_HYCMMYyqeuLsKCOyDPX2bbzTkhvmKCHt5DBgY-F6lK1FJcSCrLObxEVuhhpjKYrKr01QDI4dyxjJ-D00sFrHeGAwQeed7a9KByZS2ZTyV2Hsbvg5kDI4dyxjJ-D00jrb329I5-Aq83iSc2huX1uXNFtd41sQg0bIqqodFICRcggLw7b > > > _______________________________________________ > SC-04-08 mailing list > SC-04-08 at standards.aes.org > <http://standards.aes.org/sc.cfm?ID=91> > Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the SC-04-08 mailing list Expand 000296.html 8 KB HTML - Click to view Options Copy Download Link [SC-04-08] - Warsaw pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] - Warsaw Brian McCarty bmccarty at coralseastudios.com Mon Apr 27 23:07:33 EDT 2015 Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Well that’s a bummer. But thanks for thinking of me anyway, Philip. You heard yesterday the level of acoustical knowledge that’s now inhabiting the immersive group. Roger Dressler is a terrific ally, but I wonder why no one from Dolby proffers an opinion. Maybe they don’t know, either? Brian > On 27 Apr 2015, at 6:31 pm, philip newell <philiprnewell at gmail.com> wrote: > > Quite incredibly, I cannot get from Vigo (Spain) to Warsaw and back (on the > 6th and 11th) within single days of travelling there and back. It can only > be done with an overnight stay, en route, in one direction and 14 hours of > travelling in the other direction with a need to get to an airport by 4.30 > am. It is all out of the question. > > > Best wishes, > > > > Philip > > > > On 27 April 2015 at 06:42, david murphy <dmurphy at krix.com.au> wrote: > >> Hi all, >> I will not be in Warsaw, but intend to be at AES NY. >> I hope you have a productive meeting. >> warm regards from Down Under >> David >> >> David Murphy >> Loudspeaker Design Engineer >> Commercial Cinema >> >> Krix >> 14 Chapman Road | Hackham SA 5163 | Australia >> T +618 83843433 | F +618 83843419 >> Email: dmurphy at krix.com | Web: www.krix.com >> >> >> >> DISCLAIMER: >> This email and any files transmitted with it are confidential to the >> intended recipient and may be privileged. If you are not the intended >> recipient, please notify Krix immediately. Whilst we have used software to >> alert us to the presence of computer viruses, we cannot guarantee that this >> email and any files transmitted with it are free from them. >> ________________________________________ >> From: SC-04-08 [sc-04-08-bounces at standards.aes.org] On Behalf Of Eddy B. >> Brixen [ebb at ebb-consult.com] >> Sent: Wednesday, 22 April 2015 12:47 AM >> To: 'Working group on Measurement and equalization of sound systems >> in rooms' >> Subject: Re: [SC-04-08] - Warsaw >> >> Hi Brian, >> I'll chair the meeting in Warsaw. >> Cheers >> Eddy >> >> Eddy B. Brixen >> consultant >> >> -----Original Message----- >> From: SC-04-08 [mailto:sc-04-08-bounces at standards.aes.org] On Behalf Of >> Brian McCarty >> Sent: 21. april 2015 15:25 >> To: Bruce Olson; sc-04-08 at standards.aes.org >> Cc: Andres Mayo; Francis Rumsey >> Subject: [SC-04-08] - Warsaw >> >> There has no agenda been posted for SC-04-08 in Warsaw. >> >> Has a new chair been named? >> Who’s managing the meeting in Warsaw? >> >> >> Brian McCarty >> >> >> >> >> _______________________________________________ >> SC-04-08 mailing list >> SC-04-08 at standards.aes.org >> < >> http://cp.mcafee.com/d/FZsS739J5xcQsK9CzBxNUTsSzssCqen7TXL6QrzAPhOU-VtYSzssCqen7TXCzASzssOCqenQT4Pq2Hslypo55oO3-nXmPpmcw_B-RISqektsspvvW_9Icf8CzDHTbFIEFY-MyOUZR4nRHFGThpVkffGhBrwqrhdFCXYyUqenAkmkXL6XCM0t9X13oEkXvFM07amWPGF8d3zzhOyrFoLtwLtUKgGT2TQ1l9X13oEkXvFM04SOMMyr1vF6y0QJz0AnKMnKYqnjh0nd402X6CC3qr9KSLZyXsL >>> >> >> _______________________________________________ >> SC-04-08 mailing list >> SC-04-08 at standards.aes.org >> < >> http://cp.mcafee.com/d/2DRPoQ86Qm4PhOUCqem77ztPqdNOpEVsvvKYrhKejd7bzXBTPqdNOpEVsvvKqejqdNPapEVvjsjdEaJNm9Bwklz8fVvJrdBoO3-nXmPpEVhRNNBZ_HYCMMYyqeuLsKCOyDPX2bbzTkhvmKCHt5DBgY-F6lK1FJcSCrLObxEVuhhpjKYrKr01QDI4dyxjJ-D00sFrHeGAwQeed7a9KByZS2ZTyV2Hsbvg5kDI4dyxjJ-D00jrb329I5-Aq83iSc2huX1uXNFtd41sQg0bIqqodFICRcggLw7b >>> >> _______________________________________________ >> SC-04-08 mailing list >> SC-04-08 at standards.aes.org >> <http://standards.aes.org/sc.cfm?ID=91> >> > _______________________________________________ > SC-04-08 mailing list > SC-04-08 at standards.aes.org > <http://standards.aes.org/sc.cfm?ID=91> Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the SC-04-08 mailing list Expand 000287.html 9 KB HTML - Click to view Options Copy Download Link [SC-04-08] X216 proposed output for comment pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] X216 proposed output for comment AES Standards standards at aes.org Tue Jan 20 07:56:25 EST 2015 Next message: [SC-04-08] X216 proposed output for comment - final call Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Dear SC-04-08, You will appreciate that project AES-X216 is currently running late. The scope of this project is: "This project will liaise with SMPTE TC-25CSS in their project to "Create a pink-noise Standard, and a reference pink-noise file available in a digital audio file and DCP formats that conform to the description of the pink noise in ST 202:2010 and RP 200-2012 and for which the time domain (mean, standard deviation, skew, kurtosis, etc) and frequency domain (energy per bandwidth, bandwidth, etc) characteristics are defined. Specify the algorithm used to generate the pink-noise file." The project will consider comments as appropriate for communication to SMPTE." I have compiled the results of this group's discussions, both on the reflector and as reported from meeting reports, as a proposed output from this group to SMPTE. Please let me know any comments as soon as possible. Your comments at this point should include alternative wording where appropriate. All reference documents are on the SC-04-08 document site. A direct login is available to members at: https://secure.aes.org/standards/documents/?ID=91 Thank you. Mark Yonge Vice-chair, SC-04-08 ********** Comments from this group: Pink noise should be generated from a pseudo-random binary sequence (PRBS) for repeatability. A pseudo random binary sequence is a sequence of digital values that has a spectrum similar to a random sequence of bits but is deterministically generated. Repeated iterations of the pseudo-random sequence should be used to produce continuous noise of arbitrary length. The PRBS could be generated using a maximum length sequence (MLS), but other forms of PRBS may be satisfactory. A pseudo-random sequence length of about 10s seems reasonable. Shorter sequences will be audibly repetitive. Longer sequences prevent predictably-rapid settling of the meter. The white-noise spectrum produced by a PRBS should be converted to pink noise using a suitable filter (aka "pinking filter"). Band-limiting. To obtain reproducible results and to avoid of over-stressing the equipment or system under test, the applied noise signal should not contain frequencies that the object under test is not intended to handle. A bandwidth of 20 Hz to 20kHz should be good for full-range systems. It is recommended that noise signals should be band-limited with maximally-flat amplitude filters of at least the third order - the 4th-order Butterworth filters proposed in the SMPTE draft should achieve this. The amplitude probability density (APD) function of the resulting pink noise should be specified. Two noise signals with the same rms value and spectrum but different APD can often produce very different results when used as test signals. It was suggested that a near-Gaussian probability density function should be preferred to make the audible content predictable. The helpful study by John Woodgate (x216woodgate_noises140606.zip, on the SC-04-08 document site) usefully clarifies this. A crest factor of 12 dB was felt to relate closely to practical conditions, is compatible with a quasi-Gaussian signal, and should also be straightforward to implement. The noise signal characteristics, including bandwidth, spectrum, and APD, for each pink-noise source should be documented, and reported with the results of measurements or tests. The pink-noise content is likely to be corrupted in unknown ways by lossy coding schemes. It will not be appropriate to play the pink noise from an MP3 file from an iPod or mobile phone! The pink noise signal should be coded as linear PCM in a Wave file (or AES31-2 Broadcast Wave file). Playback of the pink noise shall use an unprocessed digital chain terminating, where necessary, in a competent digital-to-analog convertor (DAC) to interface directly to the B-chain. [end comments] An input draft was provided by SMPTE in October (SMPTE-to-AES-re-Pink Noise_2014-10-02.pdf). The following changes are proposed based on the above comments (see also markup in x216-150113-comment-on-smpte-2014-10-02.docx): 2 Terms & Acronyms. Add: "Pseudo random binary sequence - a sequence of digital values that has a spectrum similar to a random sequence of bits but is deterministically generated. Repeated iterations of the pseudo-random sequence should be used to produce continuous noise of arbitrary length. " "Audio sampling rate" should be changed to, "audio sampling frequency". The quantity in this case has little to do with the aggregate load on a transport mechanism and everything to do with the accurate reproduction of the sampled audio signal via a DAC. "Crest factor" should indicate that peak measurements refer to instantaneous peaks, and not any kind of quasi-peak measurement. The definition of "root-mean-square" should indicate the time-dependence of the measurement. There is no such thing as an instantaneous rms value. Propose to use the existing definition from the IEC International Electrotechnical Vocabulary (IEV) [http://www.electropedia.org]. "For a time-depending quantity, positive square root of the mean value of the square of the quantity taken over a given time interval." - IEC IEV 103-02-03 "White noise": to reduce divergence, propose to use the existing IEV definition, "noise whose power spectral density is essentially independent of frequency" - IEC IEV 801-21-10 3.1.1 rms value. This clause requires the pink noise to be measured using a 22Hz to 22kHz bandpass filter. Later, in clause 4.2, the low-frequency -3dB point is specified as 10Hz. Should 3.1.1 actually specify a bandwidth of 10Hz to 22kHz? This needs to be clarified. 5.1 Sampling frequency (See above) Propose 2 new sub-clauses to cover the coding and exchange of the signal: 5.3 Signal coding The pink noise signal shall be linearly coded in PCM format. 5.4 Signal storage and exchange The pink-noise signal shall be stored as a Wave file, or Broadcast Wave Format file (see AES31-2). Annex D: Bibliography Propose: IEC 61672-1 Ed.2:2013 Electroacoustics – Sound level meters – Part 1: Specifications. International Electrotechnical Commission, Geneva, Switzerland AES31-2:2012 AES standard on network and file transfer of audio – Audio-file transfer and exchange – File format for transferring digital audio data between systems of different type and manufacture. Audio Engineering Society, New York, NY., US. Mark Yonge AES Standards Manager standards at aes.org tel: +44 1594 517200 skype: markyonge Next message: [SC-04-08] X216 proposed output for comment - final call Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the SC-04-08 mailing list Expand 000288.html 11 KB HTML - Click to view Options Copy Download Link [SC-04-08] X216 proposed output for comment - final call pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] X216 proposed output for comment - final call AES Standards standards at aes.org Fri Jan 30 12:35:45 EST 2015 Previous message: [SC-04-08] X216 proposed output for comment Next message: [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Dear C-04-08, You will have seen this request for comment from 20 January. I have seen no comment from this group so far. Assuming that no comment arrives over the weekend, I propose on Monday to forward this material to SMPTE as as AES output from liaison project AES-X216. Sincerely, Mark Yonge vice-chair SC-04-08 > On 2015-01-20, at 12:56, AES Standards <standards at aes.org> wrote: > > Dear SC-04-08, > > You will appreciate that project AES-X216 is currently running late. > > The scope of this project is: "This project will liaise with SMPTE TC-25CSS in their project to "Create a pink-noise Standard, and a reference pink-noise file available in a digital audio file and DCP formats that conform to the description of the pink noise in ST 202:2010 and RP 200-2012 and for which the time domain (mean, standard deviation, skew, kurtosis, etc) and frequency domain (energy per bandwidth, bandwidth, etc) characteristics are defined. Specify the algorithm used to generate the pink-noise file." The project will consider comments as appropriate for communication to SMPTE." > > I have compiled the results of this group's discussions, both on the reflector and as reported from meeting reports, as a proposed output from this group to SMPTE. Please let me know any comments as soon as possible. Your comments at this point should include alternative wording where appropriate. > > All reference documents are on the SC-04-08 document site. A direct login is available to members at: > https://secure.aes.org/standards/documents/?ID=91 > > Thank you. > > Mark Yonge > Vice-chair, SC-04-08 > > ********** > Comments from this group: > > Pink noise should be generated from a pseudo-random binary sequence (PRBS) for repeatability. A pseudo random binary sequence is a sequence of digital values that has a spectrum similar to a random sequence of bits but is deterministically generated. Repeated iterations of the pseudo-random sequence should be used to produce continuous noise of arbitrary length. The PRBS could be generated using a maximum length sequence (MLS), but other forms of PRBS may be satisfactory. > > A pseudo-random sequence length of about 10s seems reasonable. Shorter sequences will be audibly repetitive. Longer sequences prevent predictably-rapid settling of the meter. > > The white-noise spectrum produced by a PRBS should be converted to pink noise using a suitable filter (aka "pinking filter"). > > Band-limiting. To obtain reproducible results and to avoid of over-stressing the equipment or system under test, the applied noise signal should not contain frequencies that the object under test is not intended to handle. A bandwidth of 20 Hz to 20kHz should be good for full-range systems. It is recommended that noise signals should be band-limited with maximally-flat amplitude filters of at least the third order - the 4th-order Butterworth filters proposed in the SMPTE draft should achieve this. > > The amplitude probability density (APD) function of the resulting pink noise should be specified. Two noise signals with the same rms value and spectrum but different APD can often produce very different results when used as test signals. It was suggested that a near-Gaussian probability density function should be preferred to make the audible content predictable. The helpful study by John Woodgate (x216woodgate_noises140606.zip, on the SC-04-08 document site) usefully clarifies this. > > A crest factor of 12 dB was felt to relate closely to practical conditions, is compatible with a quasi-Gaussian signal, and should also be straightforward to implement. > > The noise signal characteristics, including bandwidth, spectrum, and APD, for each pink-noise source should be documented, and reported with the results of measurements or tests. > > The pink-noise content is likely to be corrupted in unknown ways by lossy coding schemes. It will not be appropriate to play the pink noise from an MP3 file from an iPod or mobile phone! The pink noise signal should be coded as linear PCM in a Wave file (or AES31-2 Broadcast Wave file). > > Playback of the pink noise shall use an unprocessed digital chain terminating, where necessary, in a competent digital-to-analog convertor (DAC) to interface directly to the B-chain. > [end comments] > > > > An input draft was provided by SMPTE in October (SMPTE-to-AES-re-Pink Noise_2014-10-02.pdf). The following changes are proposed based on the above comments (see also markup in x216-150113-comment-on-smpte-2014-10-02.docx): > > 2 Terms & Acronyms. > Add: "Pseudo random binary sequence - a sequence of digital values that has a spectrum similar to a random sequence of bits but is deterministically generated. Repeated iterations of the pseudo-random sequence should be used to produce continuous noise of arbitrary length. " > > "Audio sampling rate" should be changed to, "audio sampling frequency". The quantity in this case has little to do with the aggregate load on a transport mechanism and everything to do with the accurate reproduction of the sampled audio signal via a DAC. > > "Crest factor" should indicate that peak measurements refer to instantaneous peaks, and not any kind of quasi-peak measurement. > > The definition of "root-mean-square" should indicate the time-dependence of the measurement. There is no such thing as an instantaneous rms value. Propose to use the existing definition from the IEC International Electrotechnical Vocabulary (IEV) [http://www.electropedia.org]. > "For a time-depending quantity, positive square root of the mean value of the square of the quantity taken over a given time interval." - IEC IEV 103-02-03 > > "White noise": to reduce divergence, propose to use the existing IEV definition, "noise whose power spectral density is essentially independent of frequency" - IEC IEV 801-21-10 > > 3.1.1 rms value. This clause requires the pink noise to be measured using a 22Hz to 22kHz bandpass filter. Later, in clause 4.2, the low-frequency -3dB point is specified as 10Hz. Should 3.1.1 actually specify a bandwidth of 10Hz to 22kHz? This needs to be clarified. > > 5.1 Sampling frequency (See above) > > Propose 2 new sub-clauses to cover the coding and exchange of the signal: > > 5.3 Signal coding > The pink noise signal shall be linearly coded in PCM format. > > 5.4 Signal storage and exchange > The pink-noise signal shall be stored as a Wave file, or Broadcast Wave Format file (see AES31-2). > > Annex D: Bibliography > > Propose: > > IEC 61672-1 Ed.2:2013 Electroacoustics – Sound level meters – Part 1: Specifications. International Electrotechnical Commission, Geneva, Switzerland > > AES31-2:2012 AES standard on network and file transfer of audio – Audio-file transfer and exchange – File format for transferring digital audio data between systems of different type and manufacture. Audio Engineering Society, New York, NY., US. Mark Yonge AES Standards Manager standards at aes.org tel: +44 1594 517200... Expand This file was truncated for preview. Please download to view the full file. 000289.html 3 KB HTML - Click to view Options Copy Download Link [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File AES Standards standards at aes.org Thu Feb 5 12:48:18 EST 2015 Previous message: [SC-04-08] X216 proposed output for comment - final call Next message: [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File (ii) Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Dear Alan, Please find attached our liaison report for project AES-X216 on Calibration Pink-Noise Standard and Test File. Sincerely, Mark Yonge AES Standards Manager standards at aes.org tel: +44 1594 517200 skype: markyonge Previous message: [SC-04-08] X216 proposed output for comment - final call Next message: [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File (ii) Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the SC-04-08 mailing list Expand 000290.html 3 KB HTML - Click to view Options Copy Download Link [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File (ii) pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File (ii) AES Standards standards at aes.org Thu Feb 5 13:43:23 EST 2015 Previous message: [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Dear Alan, Please find attached our liaison report for project AES-X216 on Calibration Pink-Noise Standard and Test File. Sincerely, Mark Yonge AES Standards Manager standards at aes.org tel: +44 1594 517200 skype: markyonge -------------- next part -------------- -------------- next part -------------- PS: Because AES email reflectors do not support attachments, SC-04-08 members cam find the attached documents on the secure document site at: https://secure.aes.org/standards/documents/?ID=91 Previous message: [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the SC-04-08 mailing list Expand 000291.html 2 KB HTML - Click to view Options Copy Download Link [SC-04-08] - Warsaw pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] - Warsaw Brian McCarty bmccarty at coralseastudios.com Tue Apr 21 09:24:48 EDT 2015 Previous message: [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File (ii) Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] There has no agenda been posted for SC-04-08 in Warsaw. Has a new chair been named? Who’s managing the meeting in Warsaw? Brian McCarty Previous message: [SC-04-08] Liaison report: AES-X216 on Calibration Pink-Noise Standard and Test File (ii) Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the SC-04-08 mailing list Expand 000292.html 3 KB HTML - Click to view Options Copy Download Link [SC-04-08] - Warsaw pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] - Warsaw Bruce C. Olson bco at aes.org Tue Apr 21 10:53:36 EDT 2015 Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] See http://www.aes.org/standards/meetings/ On Tue, Apr 21, 2015 at 08:24:48, Brian McCarty wrote: > There has no agenda been posted for SC-04-08 in Warsaw. > > Has a new chair been named? > Who’s managing the meeting in Warsaw? > > > Brian McCarty -- Bruce C. Olson Audio Engineering Society Standards Committee Chair phone: +1 (763) 493-5835 email: bco at aes.org web: http://www.aes.org/standards/ Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the SC-04-08 mailing list Expand 000293.html 3 KB HTML - Click to view Options Copy Download Link [SC-04-08] - Warsaw pre { white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ } [SC-04-08] - Warsaw Eddy B. Brixen ebb at ebb-consult.com Tue Apr 21 11:17:36 EDT 2015 Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Hi Brian, I'll chair the meeting in Warsaw. Cheers Eddy Eddy B. Brixen consultant -----Original Message----- From: SC-04-08 [mailto:sc-04-08-bounces at standards.aes.org] On Behalf Of Brian McCarty Sent: 21. april 2015 15:25 To: Bruce Olson; sc-04-08 at standards.aes.org Cc: Andres Mayo; Francis Rumsey Subject: [SC-04-08] - Warsaw There has no agenda been posted for SC-04-08 in Warsaw. Has a new chair been named? Who’s managing the meeting in Warsaw? Brian McCarty _______________________________________________ SC-04-08 mailing list SC-04-08 at standards.aes.org <http://standards.aes.org/sc.cfm?ID=91> Previous message: [SC-04-08] - Warsaw Next message: [SC-04-08] - Warsaw Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the SC-04-08 mailing list Expand 0 Comments Public All Members My Connections Only Me PublicAll MembersMy ConnectionsOnly Me Public All Members My Connections Only Me