Re: [Sursound] Inexpensive USB multichannel sound card
no uk suppliers on ebay - all from the States. I eventually found it on some obscure website - but at 3 times the price as US - still cheap though. That ST-Lab "USB Sound Box" looks good though. On 30 March 2014 02:25, Marc Lavallée wrote: > Augustine Leudar a écrit : > > anyone know of a UK/Ireland supplier of the Sabrant USB-SND8 ? > > Ebay? > > Also look for the ST-Lab "USB Sound Box"; > it is similar, if not identical. > -- > Marc > ___ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > -- 07812675974 -- next part -- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20140330/0d182f6b/attachment.html> ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] BBC Radio Three Surround Streaming Trial (15. to 31. March)
On 2014-03-30, Ralf R Radermacher wrote: ...the sample clock was locked to twice the horizontal scan rate of 15625Hz, i.e. 31.25kHz. Wasn't that the rate used for PCM audio in Hi8 video recorders? Apparently so, and for the same precise reason. That applies to Hi8 derived from PAL, and with PCM -- PCM sound was a later addition to the standard which was originally fully analog. For Hi8 over NTSC the corresponding frequency is 31.46853kHz. That comes from the revised 59.94Hz field rate adopted in the color transition, divided by 525 scanlines per field. -- Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front +358-40-3255353, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2 ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] BBC Radio Three Surround Streaming Trial (15. to 31. March)
Am 30.03.14 20:48, schrieb David Pickett: Anybody know how to get access to streaming metadata? Play it back in VLC and display the stream parameters. Ralf -- Ralf R. Radermacher - Köln/Cologne, Germany Blog : http://the-real-fotoralf.blogspot.com Audio : http://aporee.org/maps/projects/fotoralf Web : http://www.fotoralf.de ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] BBC Radio Three Surround Streaming Trial (15. to 31. March)
According to Rupert Brun, Head of Technology for BBC Radio, the rate used for the 4.0 streaming frm the South Bank was 48kHz. What I dont like is that one can record the stream at 44.1kHz and the sample rate conversion appears to be dont in Windows. Is there a means of actually showing the sampling rate of audio data coming in from the internet? It must be encoded in some way that this information is passed along with it, otherwise there would be a pitch change shortly followed by a buffer overflow when trying to record at 48k stream at 44.1k! Anybody know how to get access to streaming metadata? David At 17:37 30-03-14, Andy Furniss wrote: Dave Malham wrote: 48 kHz is pretty well the international standard sample rate for broadcast organisation and has been since they started upgrading from the 32kHz used (by the Beeb) for distributing audio to FM transmitters back in the late 60's. Dave True I expect, but for some reason the "normal" 320kbit aac R3 web stream is 44.1k. ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] BBC Radio Three Surround Streaming Trial (15. to 31. March)
Am 30.03.14 19:31, schrieb Sampo Syreeni: ...the sample clock was locked to twice the horizontal scan rate of 15625Hz, i.e. 31.25kHz. Wasn't that the rate used for PCM audio in Hi8 video recorders? Ralf -- Ralf R. Radermacher - Köln/Cologne, Germany Blog : http://the-real-fotoralf.blogspot.com Audio : http://aporee.org/maps/projects/fotoralf Web : http://www.fotoralf.de ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] BBC Radio Three Surround Streaming Trial (15. to 31. March)
On 2014-03-30, Dave Malham wrote: 48 kHz is pretty well the international standard sample rate for broadcast organisation and has been since they started upgrading from the 32kHz used (by the Beeb) for distributing audio to FM transmitters back in the late 60's. ...and many others in their wake, since that rate was enshrined in NICAM and standardized as such for broadcast TV. Interestingly 32kHz is the only one of the standard rates with a history directly traceable to audio work: it's a distant relative of Bell Corporation's bandwidth requirements for analogue telephone circuit passband. Those were something like .3-3.5kHz, which given imperfect analogue anti-alias filters became a Nyquist frequency of 4kHz and so a sampling frequency of 8kHz in the early digital work. Later when higher multiplex rates were set, the European E hierarchy dropped the inelegant, inband, bitstealing utilized in the American T system, yielding a digital hierarchy with a clean 8 bits by 8kHz basic utility band per circuit. The British GPO circuits BBC designed their PCM system to be compatible with was an early instance of that sort of reasoning, so taking BBC's requirements for FM broadcast quality, the Nyquist frequency had to be at least 15kHz, and so the lowest suitable multiple became 32kHz. All of the other standards trace back to video line rates, which via the NTSC and PAL/SECAM frame rates in case trace back to the 60Hz and 50Hz mains frequencies used on the two sides of the pond. The same in fact could have happened with NICAM: BBC did entertain a version of their system where the audio frames were time division multiplexed into the horizontal blanking interval of PAL I, and the sample clock was locked to twice the horizontal scan rate of 15625Hz, i.e. 31.25kHz. However, given that BBC did radio work too (primarily?) and ended up building a separate backbone for that using NICAM, eventually they just dumped the bits onto an independent subcarrier at the higher channel edge. -- Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front +358-40-3255353, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2 ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] BBC Radio Three Surround Streaming Trial (15. to 31. March)
Dave Malham wrote: 48 kHz is pretty well the international standard sample rate for broadcast organisation and has been since they started upgrading from the 32kHz used (by the Beeb) for distributing audio to FM transmitters back in the late 60's. Dave True I expect, but for some reason the "normal" 320kbit aac R3 web stream is 44.1k. ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] Inexpensive USB multichannel sound card
There is an even cheaper one (£23.70, Amazon): http://www.amazon.co.uk/dp/B003IMG3L2 Looks like a clone of ST-Lab (etc). Looks all the ones with 4 buttons on top are based in the same hardware. I will likely take a chance on it as I also could also use a cheap USB m/c card, and that is just about an "impulse-purchase" price point. If it works on the R-Pi (all 8 channels!) that will make it extra interesting. Richard Dobson On 30/03/2014 02:25, Marc Lavallée wrote: Augustine Leudar a écrit : anyone know of a UK/Ireland supplier of the Sabrant USB-SND8 ? Ebay? Also look for the ST-Lab "USB Sound Box"; it is similar, if not identical. -- Marc ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] BBC Radio Three Surround Streaming Trial (15. to 31. March)
48 kHz is pretty well the international standard sample rate for broadcast organisation and has been since they started upgrading from the 32kHz used (by the Beeb) for distributing audio to FM transmitters back in the late 60's. Dave On 19 March 2014 16:47, Aaron Heller wrote: > I downloaded the MPD file on the FAQ page with >wget http://rdmedia.bbc.co.uk/dash/ondemand/channel_test/1/5.mpd > > If I'm reading it correctly, the channel announcements are 320 kbits/sec, > 48k sample rate. > > > Aaron > > > On Wed, Mar 19, 2014 at 1:01 AM, Kees de Visser >wrote: > > > On 19 Mar 2014, at 07:33, David Pickett wrote: > > > I suspect that most of the problems last night were at the originating > > end, though there were cases when there were beats missing as the stream > > caught up, which seemed more likely to be delays in the Internet. > > > > from the BBC blog: > > > 21. Rupert Brun, 18TH MARCH 2014 - 22:20 > > > I am sorry we lost the stream before the end of the concert this > > evening, this was due to a problem with the internet connection to the > > server at the Southbank. > > > > What would the bitrate be ? I'm also curious about the delay. Has anyone > > been able to compare the streamed audio to "fast radio" ? > > > > Kees de Visser > > > > ___ > > Sursound mailing list > > Sursound@music.vt.edu > > https://mail.music.vt.edu/mailman/listinfo/sursound > > > -- next part -- > An HTML attachment was scrubbed... > URL: < > https://mail.music.vt.edu/mailman/private/sursound/attachments/20140319/cac673b8/attachment.html > > > ___ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > -- As of 1st October 2012, I have retired from the University. These are my own views and may or may not be shared by the University Dave Malham Honorary Fellow, Department of Music The University of York York YO10 5DD UK 'Ambisonics - Component Imaging for Audio' -- next part -- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20140330/f4581a98/attachment.html> ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] Soundfield 450 Mk2
I, too, find it really odd that a facility that was there in the very earliest production Soundfields (and which I used as a matter of course every time I used them) is no longer there in this model even tho' it would cost less to add it now than back in the 70's. Still, it IS about the only thing that there is wrong with it :-) Dave On 20 March 2014 12:57, Jon Honeyball wrote: > > Pity this *still* doesn¹t have a 1K tone generator at say -20dB, allowing > you to properly calibrate the input levels and replay of your recorder, > which almost certainly doesn¹t have ganged controls. The Sounddevices 788T > can do this, but others can¹t. Missed opportunity. > > Jon > > ___ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > -- As of 1st October 2012, I have retired from the University. These are my own views and may or may not be shared by the University Dave Malham Honorary Fellow, Department of Music The University of York York YO10 5DD UK 'Ambisonics - Component Imaging for Audio' -- next part -- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20140330/46904f66/attachment.html> ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
