Re: [linux-audio-user] Pulling off old 2-track reels and trying to slow them down

On Sun, 24 Apr 2005, Alan Taylor wrote: Actually, for the real-time varispeed, ardour does *not* use libsamplerate, but a handcrafted linear interpolation from Steve Harris. This is also unsuitable for high quality archival work. If you can use ardour or alsaplayer to estimate the exact amount of resampling you need, you can then use: sndfile-resample -by <amount_ratio> infile.wav outfile.wav to do a high quality resampling. You'll want to use the inverse of the varispeed you find to get the correct resampling. The resulting file will have a weird sample rate, but if played back at the original sample rate of your capture will sound correct. You can replace the samplerate field in the output wav file with the attached python script. Run it as follows (example assumes a 48000 original capture): python wavsrmod.py 48000 outfile.wav As mentioned by others, the higher capture rate you can achieve the better quality you'll get, but depending on the source, 48k might be good enough. Hope this helps. jlc