I have a sine wave audio test file generated with Matlab in FLAC and
also WAV formats which load into several audio applications at full
scale amplitude (16-bit sine wave peaks at +32767 and -32767). The
other applications play this file at maximum full scale amplitude yet
FFPLAY plays the file at 3dB down from maximum amplitude. Converting
the file with FFMPEG to other formats results in an identical amplitude
file which is full scale also. Other programs play this file at maximum
amplitude but FFPLAY again is at -3dB from full scale. Is there a
command that I need to issue to FFPLAY to make it play at the native
volume?
Here is my command:
C:\ffmpeg\bin\ffplay -volume 100 Sine_65s_997Hz@FS_44.1k_16b_int16.flac
The sine wave FLAC file is 1.7MB and I can provide that if that would be
useful.
Odd thing here is that I have tried several song files, and even live
audio streams in FFPLAY, and they play at the correct full scale amplitude.
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