On Thu, 2004-09-09 at 15:13, Kai Vehmanen wrote: > On Thu, 9 Sep 2004, Mark Knecht wrote: > > > How would I be sure that my emerge of ecasound uses libsamplerate > > capabilities? Can this be observed at runtime? Or in the output files > > somehow? Anywhere else? > > ldd `which ecasound` |grep libsamplerate flash mark $ ldd `which ecasound` |grep libsamplerate libsamplerate.so.0 => /usr/lib/libsamplerate.so.0 (0x40067000) flash mark $ Oops - I did have white space in the command line: <SNIP> -i:resample-hq,auto, data/GTSB-96K... <SNIP> flash mark $ ecasound -f:16,2,44100 -i:resample-hq,auto,data/GTSB-96K-24bit-Audio/T01-Startdust.L.wav -o:TEST1.wav **************************************************************************** * ecasound v2.3.3 (C) 1997-2004 Kai Vehmanen **************************************************************************** - [ Session created ] ------------------------------------------------------ - [ Chainsetup created (cmdline) ] ----------------------------------------- - [ Connecting chainsetup ] ------------------------------------------------ (eca-chainsetup) 'nonrt' buffering mode selected. (eca-chainsetup) Audio object "data/GTSB-96K-24bit-Audio/T01-Startdust.L.wav", mode "read". (audio-io) Format: s24_le, channels 1, srate 44100, interleaved. (eca-chainsetup) Audio object "TEST1.wav", mode "read/write". (audio-io) Format: s16_le, channels 2, srate 44100, interleaved. - [ Chainsetup connected ] ------------------------------------------------- (eca-controller) Connected chainsetup: "command-line-setup". - [ Controller/Starting batch processing ] --------------------------------- - [ Engine init - Driver start ] ------------------------------------------- Warning: DBC_CHECK failed - "impl_repp->rt_lock_rep != true", samplebuffer.cpp, 850. - [ Controller/Batch processing finished ] --------------------------------- - [ Engine exiting ] ------------------------------------------------------- (eca-controller) Disconnecting chainsetup: "command-line-setup". - [ Chainsetup disconnected ] ---------------------------------------------- flash mark $ and the output is corretly 44.1K flash mark $ sndfile-info TEST1.wav Version : libsndfile-1.0.10 ======================================== File : TEST1.wav Length : 37533024 RIFF : 37533012 WAVE fmt : 16 Format : 0x1 => WAVE_FORMAT_PCM Channels : 2 Sample Rate : 44100 Block Align : 4 Bit Width : 16 Bytes/sec : 176400 data : 37532980 End ---------------------------------------- Sample Rate : 44100 Frames : 9383245 Channels : 2 Format : 0x00010002 Sections : 1 Seekable : TRUE Duration : 00:03:32.771 Signal Max : 27180 (-1.62 dB) flash mark $ > > > Anyway, If I'm going to downsize from 24-bits to 16-bits then I want > > to add dithering, but I see no mention of dithering in man ecasound. I > > know jack has an option to dither it's outputs, but from some dark > > remote part of my memory I seem to remember that this only effects the > > output going to the sound card and not what's going to a file. Comments > > anyone? > > Unfortunately no. Adding dithering has been on the todo-list for ages, > but still not implemented. :( I can understand having things like this on your todo list. I guess I'm now wondering if anyone running Linux is dithering their files before they make CDs? Possibly no one is doing this? I'm just very used to doing it on the Pro Tools side, and I still can, but it would be nice to set up a mastering environment under Alsa and just stay in Linux all the way to burning the CD if possible. I'd hate to go back to Windows just for the dithering step. (I might have to if Linux dithering isn't up to the task, as well it might not be if no one is really using it. We'll see. (Or hear...) ;-) Anyway, it's a few days away and not a huge amount of work if I have to. > > Also, Ecasound's 24bit is really 24bit, not the 24-in-32bit. This is > usually not a problem, just as long you are aware of it. I don't think that's a problem for me as long as I can send it back to Pro Tools for dithering. I'll test that tonight or tomorrow. Possibly I'll have to run sndfile-convert on the output before I go back? We'll see... Thanks for your help! - Mark
