OBD:SNDD: Difference between revisions

OBD:SNDD (view source)

1 byte added , 10 December 2021

m

5,389

edits

@@ Line 482: / Line 482: @@
 :The PC retail engine formally allows for an arbitrary sample rate (and a corresponding data rate) to be specified in the WAVfmt header, but actually the engine interprets all waveforms as 22.05 kHz.
 :*If the WAVEfmt header is enabled and specifies MS ADPCM encoding (format ID 2), then the sample rate and data rate are completely ignored (you can fill those fields with zeroes or garbage, and it will still work).
-:*If the WAVEfmt header is enabled and specifies PCM storage (format ID 1), then fully arbitrary (inconsistent) sample rate and data rate will cause playback glitches or interruption, whereas mutually consistent pairs ("data rate" equal to "sample rate"x"block size") are eventuall ignored. In other words, you have to specify a valid sample rate and data rate, but the engine will end up using 22.05 kHz anyway.
+:*If the WAVEfmt header is enabled and specifies PCM storage (format ID 1), then fully arbitrary (inconsistent) sample rate and data rate will cause playback glitches or interruption, whereas mutually consistent pairs ("data rate" equal to "sample rate"x"block size") are eventually ignored. In other words, you have to specify a valid sample rate and data rate, but the engine will end up using 22.05 kHz anyway.
 :*If the IMA4 header is enabled (overriding WAVEfmt), then the header only specifies the channel count and the "number of packets", and the sample/data rates are again completely ignored.