Hi, Louis, This is a complex question. While I do not attempt speed changes for grooved media, I do it often for magnetic media, especially those horrific "rim drive" reel or cassette machines where the speed was never constant. With that said, I suspect that every DAW is different. I have a bit of experience with my main DAW, Samplitude, and a small amount of experience with the Diamond Cut series of programs for this function. Samplitude always had a linear speed-correct function, where one could change the speed, pitch, or both a constant amount for the duration. It was only in the later versions that they produced the capability of making a "ramp" or a "speed profile". The options are: Resample Standard Beat Marker Stretching (smooth) Smooth Beat Marker Splicing Beat Marker Stretching Monophonic Voice Universal HQ The ONLY one that mimics the varispeed knob on an analog machine is Resample. In this mode the speed and pitch knobs are reciprocally interlocked, as you would expect and it is the only one to proceed without horrid artifacts. If I am going to vari-speed something I try to start with a 96 ks/s transfer because if you have to slow something down and you only have 44.1 ks/s and you cut the speed by 1/2, you end up with effectively 22.05 ks/s. In Samplitude select Resample prior to invoking "Elastic Audio" if you need a speed profile or other non-constant adjustment. In Diamond Cut, their speed adjustment (from the earliest version I had) included a start and end speed and then the ability to hinge a series of curves to approximate the speed trajectory. I believe this, too, resampled and sounded reasonably good, but I just don't use the product in my work flow anymore. Cheers, Richard On 2012-10-10 12:15 PM, Louis Hone wrote: > What do you use to bring it back to the right speed in your computer? I've > never had much success with plugins. I always hear artifacts except on > material that need less than one semitone correction. > > Louis Hone > > 2012/10/10 DAVID BURNHAM <[log in to unmask]> > >> One thing you have to be careful of when transferring at the wrong speed >> is the playback characteristic. Since this is a frequency curve, playing >> the record at the slower speed will displace the frequencies on the curve. >> One way to get around this, if your amp and workstation can do it, is to >> record the disc flat, (no playback characteristic), and then generate the >> appropriate curve in the computer after the record has been brought back up >> to speed. >> >> db >> -- Richard L. Hess email: [log in to unmask] Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX http://www.richardhess.com/tape/contact.htm Quality tape transfers -- even from hard-to-play tapes.