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Topic: Different Uncompressed Output with Audacity? (Read 3526 times) previous topic - next topic
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Different Uncompressed Output with Audacity?

Hi there.
I have been searching a way to split a multichannel wav file at certain timestamp for a long time.
The Audacity 1.3.9 can export multichannel files when I ticked "Use custom mix" in Preferences-Import/Export, so my problem seems to be solved at last.

But following test forced me to stop using Audacity to complete the task.

Tools:
Audacity 1.3.9
flac 1.2.1

source file: test.wav(16bit 5.1ch, not WaveFormatEX) - 12,142,700 bytes
encode with "flac -8 --channel-map=none test.wav" -> test.flac: 5,276,868 bytes

open test.wav in Audacity -> file - export (WAV Microsoft signed 16bit PCM) to export.wav - 12,142,700 bytes
encode with "flac -8 --channel-map=none export.wav" -> export.flac: 5,408,631 bytes

If export.wav has the same waveform with test.wav, I think flac shouldn't output different in size and bitrate.

Here's the sample wav file for reproduce the situation.
http://ifile.it/rnpcemj

Have I missed any option like "direct stream copy" in Virtualdub for lossless processing in Audacity?

Different Uncompressed Output with Audacity?

Reply #1
Preferences -> Quality -> High-quality conversion -> Dither. Set it to "none"

 

Different Uncompressed Output with Audacity?

Reply #2
Yes it works now! Thank you!