creating custom loops -ACID Product Family - MAGIX Community Forums Archive

Subject:creating custom loops Posted by: L25 Date:4/5/2003 11:51:27 AM mD and Rockitglider have some good posts such as http://www.sonicfoundry.com/forums/ShowMessage.asp?MessageID=79697&Page=0 but I still have a few questions. I have Forge6. I want to create custom arp loops from a HW synth. Say I record several measures of audio, and I want to make a one measure loop. Is it important that I select/copy the exact loop region before Paste to New, or can I just eyeball it. How do I then make an exact trim? Any elaboration on the loop tuner zero crossing adjustments would help. I would love to see a tutorial, starting at recording your audio file to final loop tweaking. Thanks, L25
Subject:RE: creating custom loops Reply by: Iacobus Date:4/5/2003 2:07:45 PM I'd say work with the file using the Loop Tuner until you get the file looping just right, then select the data between the sample markers, copy and then try pasting to new. (Or you can just take the data between the markers and drag it onto the Sound Forge workspace.) That way, you can keep your original if you need to go back to it. When you use the Loop Tuner, the best way to ensure a file loops correctly is to be sure the end points of the loop have equal slopes for their waveforms. For example, if a loop ends at -28 dB it should eventually (and ideally) slope to an equal or similar value at the beginning of the loop. (The zero crossing should be in-between there where the loop ends and then begins.) This is not a hard and fast rule, of course, and is just a guideline. There are some great tips in Sound Forge 6.0's online help. Press F1 and under the Index tab, type in Loop Tuner. HTH, Iacobus
Subject:RE: creating custom loops Reply by: Jessariah Date:4/6/2003 11:22:34 AM To add to what Iacobus said, you can either do it by ear or by exact time (or samples). Depending on the BPM, one measure would be exactly X time or samples. To find out the precise time or samples, set your multitrack recorder to the BPM you want. Record silence. Split out one measure and render it as a wave, then bring it into Forge and see what the amount of time is or number of samples are. Trim your loop to match. If the end doesn't fall on a zero crossing, just put a quick fade out at the end (which is what Acid does by default when you only use a partial loop. You want it to be a silent sample, because some programs (like Sonar)find the closest zero crossing to the measure mark when using the split tool. So your one-measure sample at 90BPM might be 2.672 or 2.661 seconds in length. It should be 2.666 seconds, so you can adjust it accordingly. Most of the time, you don't hear it if it's a bit off, but it's nice to know if you're a precision freak.

Subject:creating custom loops

Posted by: L25

Date:4/5/2003 11:51:27 AM

mD and Rockitglider have some good posts such as http://www.sonicfoundry.com/forums/ShowMessage.asp?MessageID=79697&Page=0 but I still have a few questions.

I have Forge6. I want to create custom arp loops from a HW synth. Say I record several measures of audio, and I want to make a one measure loop. Is it important that I select/copy the exact loop region before Paste to New, or can I just eyeball it. How do I then make an exact trim?

Any elaboration on the loop tuner zero crossing adjustments would help. I would love to see a tutorial, starting at recording your audio file to final loop tweaking.

Thanks,

L25

Subject:RE: creating custom loops

Reply by: Iacobus

Date:4/5/2003 2:07:45 PM

I'd say work with the file using the Loop Tuner until you get the file looping just right, then select the data between the sample markers, copy and then try pasting to new. (Or you can just take the data between the markers and drag it onto the Sound Forge workspace.) That way, you can keep your original if you need to go back to it.

When you use the Loop Tuner, the best way to ensure a file loops correctly is to be sure the end points of the loop have equal slopes for their waveforms. For example, if a loop ends at -28 dB it should eventually (and ideally) slope to an equal or similar value at the beginning of the loop. (The zero crossing should be in-between there where the loop ends and then begins.) This is not a hard and fast rule, of course, and is just a guideline.

There are some great tips in Sound Forge 6.0's online help. Press F1 and under the Index tab, type in Loop Tuner.

HTH,
Iacobus

Subject:RE: creating custom loops

Reply by: Jessariah

Date:4/6/2003 11:22:34 AM

To add to what Iacobus said, you can either do it by ear or by exact time (or samples). Depending on the BPM, one measure would be exactly X time or samples. To find out the precise time or samples, set your multitrack recorder to the BPM you want. Record silence. Split out one measure and render it as a wave, then bring it into Forge and see what the amount of time is or number of samples are. Trim your loop to match. If the end doesn't fall on a zero crossing, just put a quick fade out at the end (which is what Acid does by default when you only use a partial loop.

You want it to be a silent sample, because some programs (like Sonar)find the closest zero crossing to the measure mark when using the split tool. So your one-measure sample at 90BPM might be 2.672 or 2.661 seconds in length. It should be 2.666 seconds, so you can adjust it accordingly.

Most of the time, you don't hear it if it's a bit off, but it's nice to know if you're a precision freak.