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Hello all, I am using the 6711 DSK to do mp3 decoding. I want to know how to play the PCM samples. Can I use the TLC320AD535 on the board? I see it has a 8kHz sampling frequency, will this be a problem to play music? Will the sound quality be bad? Or should I maybe use an audio daughter card? Any other information on this subject (code, app. notes, tips) is also appreciated. Thank you very much. |
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Playing PCM audio samples
Started by ●September 19, 2003
Reply by ●September 19, 20032003-09-19
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--- melaniesaayman <> wrote: > I am using the 6711 DSK to do mp3 decoding. > I want to know how to play the PCM samples. you mean you get mp3 data from your PC, decode it in the C6711DSK and then you want to "play them"? If so - there's no problem with playing them through AD535 although the quality will be poor due to it's 8kHz sampling rate... > Can I use the TLC320AD535 on the board? yeah - that's what it's there for... right? > I see it has a 8kHz sampling frequency, > will this be a problem to play music? why would it be? > Will the sound quality be bad? "bad" is a relative term - some people like it ;-) and why don't you try it out by converting some audio files to 8kHz sampling rate on your PC and see (hear) if it's acceptable for you? > Or should I maybe use an audio daughter card? you mean the PCM3003 card? surely the quality will be much better as it's working with 48kHz sound as default - or rather 24kHz due to the mistake in the user's manual ;-) also - remember that either way you'll have to deal with the interpolation/decimation if you have 44.1kHz sampling rate in your MP3 files... > Any other information on this subject (code, app. > notes, tips) is also appreciated. well... if you decide to use PCM3003 and have trouble using it - feel free to ask me - I have some sample code etc... good luck... Wojciech Rewers (still looking for a job) __________________________________ |
Reply by ●September 19, 20032003-09-19
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Melanie- > I am using the 6711 DSK to do mp3 decoding. > > I want to know how to play the PCM samples. Can I use the > TLC320AD535 on the board? I see it has a 8kHz sampling frequency, > will this be a problem to play music? Will the sound quality be > bad? > > Or should I maybe use an audio daughter card? Yes the sound quality for music will be bad at 8 kHz. A daughtercard with sampling rate at least 24 kHz would be a good idea; you might also want to consider 2-channel (stereo) depending on your music examples and project requirements. For a "consumer electronics" sound-quality equivalent, the sampling rate should be at least 44.1 kHz. Jeff Brower system engineer Signalogic |
