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Tempo Adjustment

Started by jimsan55, June 13, 2024, 02:36:51 PM

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jimsan55

I fear I've lost the plot lately & this is going to sound silly I think!

My old fingers aren't what they were but I enjoy quick recording live (not as MIDI). Is it possible to record a song at a slower tempo through quick record and then adjust the tempo later?

I have a feeling that my brain just isn't as it was

BogdanH

hi jimsan55,
No, that's no possible -at least not without a big loss of quality.
Normally if we increase the speed (tempo) of audio file, then pitch becomes higher. There are some audio tools which can increase/reduce the speed without changing the pitch. But that works only in small range -and even then there's substantial quality loss.

Bogdan
PSR-SX700 on K&M-18820 stand
Playing for myself on Youtube

mikf

Why are you opposed to quick recording it as a midi... doesn't make any difference when you're playing. Then you can do anything you like with tempo and transfer it to mp3.
Actually it's generally good practice to record everything first as a midi. Makes any editing easy, and has no real downside even if you don't need to edit.
Mike

jimsan55

Thanks guys.
Much appreciated

pjd

If you want to try one of those tools mentioned by Bogdan, the free Audacity tool can change tempo. Select the audio and then choose Effect > Change Tempo from the menu bar.

I use zplane deCoda for figuring out chords and melodies. zplane has a bunch of affordable tools. deCoda can speed up and slow down without changing pitch.

Have fun -- pj

Amwilburn

You *really* should record in midi at one tempo and then change the tempo as needed (as already suggested above, by everyone else), and *then* render to audio. No artifacting, no glitching. Yes, there is such a thing as temporal aliasing, but that purely has to do with time, not the quality of the sound being played back, and is invisible to our ears (unless you're getting up there in repetitions). Then no need for any fancy software

That way you can record at a slow midi tempo, and then on *wav* recording, bring it up to the correct tempo and record the audio from your now perfected midi. Heck, for fast twiddly bits, you can even step record; which is sequence by playing back the notes at your leisure

Mark