search for: sweep50

...w 24 Hz and ended almost at 24 kHz. And it was 50 seconds long. > How did you obtain it, I used Angelo Farina's "Aurora" modules. One of them is called "Generate sine sweep". > and how exactly did you encode and decode it? 1) Opusenc --bitrate 12 --downmix-mono Sweep50.wav Sweep50.opus 2) Opusdec --float Sweep50.opus Sweep50out.wav ----- Petr

...08:30:31, hans at stare.cz wrote: > On Aug 07 00:41:52, petrparizek2000 at yahoo.com wrote: > > ????#1. To test encoding at low bitrates, I encoded a sine sweep at 12 kbps > > with Opusenc and then decoded the resulting file with Opusdec. > 1) Opusenc --bitrate 12 --downmix-mono Sweep50.wav Sweep50.opus Why are you using a stereo file containing the same sweep in both channels and then downmixing to mono? Also, why are you repeating the sweep twice in every channel? Also also, the file you linked to is Sweep50FlatMidSide.wav as opposed to Sweep50.wav - is it really the same fil...

On Aug 07 00:41:52, petrparizek2000 at yahoo.com wrote: > ????#1. To test encoding at low bitrates, I encoded a sine sweep at 12 kbps > with Opusenc and then decoded the resulting file with Opusdec. What sine sweep exactly? How did you obtain it, and how exactly did you encode and decode it? Jan > The strange > thing was that even though the output wave file was at 48 kHz, it

.... One of them is called "Generate > sine sweep". Can you please make that sound file available? It is hard to tell without having anything. (50s of sines shouldn't be large.) > > and how exactly did you encode and decode it? > > 1) Opusenc --bitrate 12 --downmix-mono Sweep50.wav Sweep50.opus > 2) Opusdec --float Sweep50.opus Sweep50out.wav

...nnel is the same again (i.e. "mid" is silent). > Also, why are you repeating the sweep twice in every channel? In the first case the two channels go in equal polarities while in the second case the two channels go in opposite polarities. > Also also, the file you linked to is Sweep50FlatMidSide.wav > as opposed to Sweep50.wav - is it really the same file? Yes, it's the same data. > Why are you using floats for the decoded file? Floating-point values are not limited to the range (-1,+1). If the compression accidentally makes the signal too loud, floating-point o...