Dial-up bitrate listening test Reply #25 – 2004-06-19 18:34:11 Hello all,I agree that 32 Kbps is an interesting data point, both for modem audio streaming, and for the audio track of a video stream at moderate broadband data rates.A few points:Might be interesting to hear LAME using its low bitrate tuned modes. No 32 Kbps presetQDesign testing will need to be done with the full QDesign Music Pro 2 version, not the free one with QuickTime. However, that codec is largely deprecated for QuickTime use these days in favor of Apple's MPEG-4 AAC-LC codec.For RealAudio, we should probably test both RealAudio 8 Stereo Music (aka "cook") and the new RealAudio 10 codec (AAC-LC based). Note the RA8 stereo codec is way better than the RA mono codec, even with mono source.The "sweet spot" KHz for optimal quality might vary from codec to codec. I'll argue it's better to pick the right sample rate for each codec in order to let each codec show its best.And if this goes well, maybe we should do another test at 16 Kbps. There's a lot of interest there for audio for modem rate video streams, and for mobile devices and streaming radio. The WMA Voice codec does nicely there.I've deployed audio content down to 4 Kbps for real-world projects.