On 28/03/2012 19:27, Aleš Keprt wrote:
> My final choice is Microsoft ADPCM, its bitrate is 384 kbps (for 48kHz
> stereo), i.e. 172 MB per hour, and I think the audio quality is good.

I tried ADPCM for SimCoupe but wasn't very happy with it.  MS-ADPCM was
brighter than IMA-ADPCM, but still seemed to have too much extra noise
and swooshiness (for want of a better word!).

It will depend on what you're recording too.  Spot effect and pure notes
are probably fine, but it struggled with rapid note changes in some
music.  My early recordings were of Manic Miner, and it was the in-game
music that put me off.

Here are some samples, including PCM and ADPCM variations:
  http://simonowen.com/misc/sndcompare.zip (661K)

The ADPCM versions seem quite inconsistent, as the quantisation size
vary between blocks.  I actually prefer the constant quality of the
22kHz 8-bit PCM instead.

Again, it depends what you plan to do with the recordings.  Chances are
they're just uploaded to YouTube, where they video will usually suffer
more than the audio (~128kbps AAC) in transcoding.

I'm sticking with PCM for now, with an option to vary the quality.
MS-RLE has served me well on the video side, and is widely supported.

Si

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