Subject:no help on soundforge forum

Posted by: djrave808

Date:12/11/2006 4:02:49 PM

maybe i can get help on old reliable acid site.I have soundforge studio 6.0 .How do i adjust tempo in it to a different value?

Subject:RE: no help on soundforge forum

Reply by: Iacobus

Date:12/12/2006 11:33:31 AM

There are a couple of ways. One is to ACIDize the sample for the proper tempo. (Special > Edit ACID Properties.) The other is to simply time stretch the sample. (Process > Time Stretch.)

Remember that the latter option will not ACIDize your sample. You'll have to do that separately under the "edit ACID properties" command, ottherwise ACID will try its best to determine what tempo the sample best fits into (which it can sometimes get wrong).

HTH,
Iacobus

Subject:RE: no help on soundforge forum

Reply by: djrave808

Date:12/12/2006 4:39:47 PM

i tried that and the sample still plays at same speed when i hit preview button.

Subject:RE: no help on soundforge forum

Reply by: DKeenum

Date:12/13/2006 5:22:10 AM

Could you give us a little more detail on what your wanting to do? I'm sure we can help.

Subject:RE: no help on soundforge forum

Reply by: JohnnyRoy

Date:12/13/2006 7:15:56 AM

> i tried that and the sample still plays at same speed when i hit preview button.

Which that did you try? mD gave you two things to try. 1) Edit the ACID properties and 2) Use Time Stretch. Which did you try? Changing the ACID properties will have no effect in Sound Forge when previewing. It only affects the playback in ACID. Time Stretch will definitely affect the playback in Sound Forge.

~jr

Subject:RE: no help on soundforge forum

Reply by: djrave808

Date:12/13/2006 1:10:12 PM

in soundforge studio 6.0 .Where if any where can I just type in a new tempo that i want the sample to be ?

Subject:RE: no help on soundforge forum

Reply by: Geoff_Wood

Date:12/13/2006 10:51:21 PM

No. Use Acid for that.

Subject:RE: no help on soundforge forum

Reply by: Pikul

Date:12/14/2006 1:11:37 PM

I'm using SF Studio 8.0, but I think it was the same with 6.0.

You open the sample with SF. Let's say you have a drum loop with 4 beats (1 measure). That's just an example. Go to the 'Special' menu then 'Edit Tempo' and where it says 'Selection lenght in beats enter 4. Now what I usually do it is to click with the mouse in another box (just click, do not change anything). This way the 'Tempo in beats per minute parameter' will recalculate by itself. What has happened is that you have told SF that your sample that lasts let's say 2.4 seconds (SF knows that) has 4 beats, so SF calculates that the speed is 100 bpm. Click OK and the 'Edit Tempo' window will close.
Now let's say that you want to convert it to 120 bpm. Go to the 'Process' menu and then 'Time Stretch'. Make sure that in the input format pop up you select bpm. Now you should notice that the 'Initial tempo' box shows the speed that SF calculated before, in our example 100 bpm. As in our example our loop is a drum loop, in the 'Mode' pop up select one of the two 'Drums' options. Now using the bar or better typing it directly, enter the final desired speed in the final tempo box (let's say 120 bpm). Now click OK and your loop will have been stretched (in this case shortened) so it's current speed is 120 bpm. If you do not like how it sounds you can 'Undo', and then try the other 'Drums' algorithm to see if its better.

I am not sure this is what you're after, it's not easy to understand from your post.

Subject:RE: no help on soundforge forum

Reply by: djrave808

Date:12/14/2006 2:34:08 PM

What i'm asking is in acid you can change the tempo by typing in the numeric number you want the project to be.If it is a 120bpm project and i want to hear what it sounds like at 100 .I can type in 100 and it will change it.In sound forge studio 6.0 can I do that with a sample I am working with?

Subject:RE: no help on soundforge forum

Reply by: Pikul

Date:12/14/2006 11:45:54 PM

Yes, but you have to tell SF what's the initial tempo. Follow my instructions and you'll understand.
What I didn't mention to you, and I think that you can do that with version 6.0 as well, is that if you just want to hear how it will sound without changing it, there also a 'Preview' button in the 'Tiem Stretch' window.
What you have to take into consideration is that SF Studio comes with a time stretch function which is not as sophisticated as in Acid, so the results are not as good. Also, that Acid now has evolved to a complete host, but at the beginning (I've used it since the first version) the only thing it did (and quite efficiently by the way) was to stretch and pitch shift loops in real time. So it's the best tool for this job. But if you follow my instructions I hope you'll be able to get what you want with SF.

Subject:RE: no help on soundforge forum

Reply by: Iacobus

Date:12/20/2006 10:42:13 AM

Adding to what Mambo said, time and tempo are related.

For example, a sample that's exactly 2 seconds long will fit exactly within a tempo of 120 BPM. There's a simple formula for this:

240 / (number of seconds) = (BPM or tempo)

This formula is handy for finding out the original tempo for a given sample. You'd (usuallly) use this as a baseline for ACIDizing.

Conversely, you can find out exactly how long a particular sample needs to be for a particular tempo using this formula:

240 / (BPM) = (number of seconds)

You could use this formula if you were starting out from scratch in Sound Forge. (e.g., You wanted to create a really funky ACIDized Loop in Sound Forge but needed to find out just how much time to insert for a particular tempo first.)

(ON EDIT: Note that this is all based on basic 4 beat samples. I'll trust you can do the math for odd-metered samples like 3 beat samples.)

Iacobus