www.hairersoft.com

Unfortunately I think there is little you can do. I tried one example,split to tracks, inverted the phase and merged with the other track and basically got the same thing; i.e, I was hoping that there would be a different stereo effect for the voice. There may be other ways to try this game, but I a...

That's the version that gave me a fair number of artifacts on a constant tone (but worked satisfactorily on music). Chuck On 12/14/12 9:17 PM, Keith Reedy wrote: Using 1.5.5 with Mountain Lion I used pitch change with no problem. Keith Reedy Click the link below to download MP3's of Keith Reedy's mu...

It might be interesting to know what version worked -- errors could crop up in versions. Chuck On 12/14/12 7:06 PM, Paul Buch wrote: One of the reason I chimed in was that I had used it successfully and often with previous versions and this was the first time I had the "click" issue. Paul ...

I don't have AP on the computer I am working with -- try looking at the spectrum of the original signal and use the 12-band attenuator and just move up the frequency. Try to pass everything greater than 250 hz. I will try to play with it this evening and see what I can do. chuck On 9/26/12 4:12 PM, ...

Can you just put a filter on it and cut all lower frequencies or attenuate them? On 9/26/12 2:30 PM, kboasso wrote: I've looked through the forums & haven't seen this one. If someone already addressed it, my apologies. I have a particular wave file, and I want to apply an Audio Unit (or other de...

Years ago in a country far away, I used Amadeus (some earlier version) to write a raw data file out. I then analyzed the data using a simple C program that I wrote (my first and last C program). I then wrote the output out and then had Amadeus read it and turn it back into an Aiff flle. This was for...

I looked at the website for Ion Audio and can find nothing that bears any resemblance to a specification. With the limited dynamic range of tape, I have my doubts that any approach is likely to be much better than any other. Chuck On 9/6/12 4:23 PM, ogyen wrote: Wow, that's a lot of trouble you've g...

The denoising algorithm is a variant of the Wiener or optimal filtering technique. The importance of the noise sampling is to get a noise spectrum that will be divided out of the frequency spectrum of the sample so it does not cut off frequencies above a certain level. I don't know why playing with ...

I don't think that is how the algorithm works, but as I say, I don't remember the details. I will look it up this afternoon in my copy of Numerical Recipes and get back on the subject. Chuck On 9/5/12 6:51 AM, rfwilmut wrote: If the noise level is, say, -40 dB and you increase it to, say, -20dB befo...

That of course is true ... but ... remember the dynamic range of most tapes is much less than 90 dB or so of most digitizers, so throwing away 10 dB really shouldn't matter much. Chuck On 9/3/12 5:19 PM, Bull wrote: pm said "I get good results by recording at a deliberately low level -- low eno...

Isoprop usually has fewer impurities -- ones that will leave a residual when the alcohol evaporates than most solvents. I would like the 1005 for this purpose because of less water. And I think isoprop is also intoxicating, as is methanol, but both are much more poisonous than ethanol. (remember the...

In my local grocery/drug store, I can buy isopropyl alcohol of 100% alcohol. I don't think isoprop is usually denatured with anything the way ethanol is. (as my analytical chemistry prof said, ethanol is the least poisonous of the alcohols). On 9/3/12 11:04 AM, rfwilmut wrote: You asked about mainte...

Since you don't know what machine recorded, the suitability of any recording recorder is, to use the technical phrase, a crap shoot. The alignment of the recoding heads can make a tremendous difference in the quality of the readout, and as you don't have any idea about the alignment of the heads of ...

Select the region you want to cut and delete it (delete key) Personally I like to then do a cross fade left (or right) at the cut region so there is no sharp change in the background noise. Chuck On 6/26/12 2:02 PM, Sammet wrote: I've just downloaded the software and read the instructions twice but ...

In some cases you can do a pretty good job. Programmatically you can go through the file, find the areas where they are clipped, take a few points either side of the clip and fit a parabola through them. This assumes that the clipping is not too severe -- I have cleaned up the sound using this techn...