There are a lot of methods.
Best quality is in following order: WaveLab = AdobeAudition, Audacity, ......... Sonar.
 
Because we digitaze thousends of tapes - this month 800 tapes on 14 tape machines - we have tested a lot of applications. Best is playing the tape in its speed. Slowing down is an absolute NoGo.
You can hear the difference.

You can do this in Sound Forge, too.
 
When I was living in Europe, I wanted to digitize some old tapes I had recorded in the US. I was using an American-specification reel to reel recorder in Europe, which played back my old tapes slow because the tape speed was controlled by the power frequency, i.e. 50 Hz in Europe compared to 60 Hz in the US. So everything played back slow and low.
 
Sound Forge did a great job. For a double-speed recording (not to mention quadruple), I wish you the best of luck. That's quite a stretch.

Keni
Hmmm...

Right direction, but i must be doing something wrong.

Im using a shorter recording to test the procedure. Same problem exists.

The first data in the clip has acoustic guitars one lefy and one right followed by a guitar left with vocal right.

As soon as I slip-stretch to 200%, I seem to lose the gtr/voc portion. It seems to only include the data from the first half of the clip.

What else am i missing?

Thanks! It's getting closer.

 
Do not slip stretch, slip edit to create extra space at the end. Follow the instructions exactly and it should work.

Anderton
Do not slip stretch, slip edit to create extra space at the end. Follow the instructions exactly and it should work.

Ok... i will explore...

THambrecht
There are a lot of methods.
Best quality is in following order: WaveLab = AdobeAudition, Audacity, ......... Sonar.
 
Because we digitaze thousends of tapes - this month 800 tapes on 14 tape machines - we have tested a lot of applications. Best is playing the tape in its speed. Slowing down is an absolute NoGo.
You can hear the difference.

That's what I'm finding.

Much too far a stretch... but.........

👽🎲🎲

Anderton
Do not slip stretch, slip edit to create extra space at the end. Follow the instructions exactly and it should work.

Thanks again Craig... This nailed it! Surprisingly listenable.
 
...at least for the little 6 minute clip. We'll see how it works for the long band/orch performance.
 
I still have to see about the wav image. It still shows blank in the extended area though the sound is there. I'm about to try bouncing it to clip...

That worked. Now importing big track...

Keni

Anderton
Do not slip stretch, slip edit to create extra space at the end. Follow the instructions exactly and it should work.

Thanks again Craig... This nailed it! Surprisingly listenable.
 
...at least for the little 6 minute clip. We'll see how it works for the long band/orch performance.

The fidelity will be the same. That's because we're not using fancy DSP to make the changes, but essentially doing what tape does...just in the digital domain. Sometimes simplest is best.

Anderton

Keni

Anderton
Do not slip stretch, slip edit to create extra space at the end. Follow the instructions exactly and it should work.

Thanks again Craig... This nailed it! Surprisingly listenable.

...at least for the little 6 minute clip. We'll see how it works for the long band/orch performance.

The fidelity will be the same. That's because we're not using fancy DSP to make the changes, but essentially doing what tape does...just in the digital domain. Sometimes simplest is best.

As the visible condition of the tape is poor, and it's a 3.75ips copy and liw gain... its hard to know causes of what im hearing, some being old tape issues, and other the recording itself, but it sounds very realistically listenable.

I ha to cut it up into smaller pieces. Sonar complains/warns that the feature is unuvailable when i tried a clip of 10 minutes. With 6-7 minute clips it does the memory thing, but works.

I did some light mastering bringing it up to a good level and burned some cd's which i believe will please my friend.

Thanks to you Craig, and he others for all the help.

If you have an android device and are willing to do this "outside the (Sonar) box", Music Speed Changer or similar apps are great for this. You can set the speed and pitch independently or linked, reverse audio, and save the results as a new wav or mp3 file up to 320kbps. Very little artifacts and works on the fly. Great for comparison testing as you can then play both versions back to back. Free version can do +/-24 semi-tones (4 octaves) and 10-500% tempo and has small ad banner at the bottom - only 99¢ to remove.
 

soens
If you have an android device and are willing to do this "outside the (Sonar) box", Music Speed Changer or similar apps are great for this. You can set the speed and pitch independently or linked, reverse audio, and save the results as a new wav or mp3 file up to 320kbps. Very little artifacts and works on the fly. Great for comparison testing as you can then play both versions back to back. Free version can do +/-24 semi-tones (4 octaves) and 10-500% tempo and has small ad banner at the bottom - only 99¢ to remove.
 

 
Thanks...
 
I have an android phone, but probably too little memory and the likes for anything useful other than telephone. I mostly use iPads with ios for such stuff, but I will check it out...