Post your questions, opinions and reviews of the MPC1000. This forum is for discussion of the OFFICIAL Akai OS (2.1). If you wish to discuss the JJ OS, please use the dedicated JJ OS forum
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By d_loc Tue Dec 13, 2005 11:31 pm
How do you get a sound to loop on the MPC without having a click in the middle?

Even if I go into log view and full magnify, then find two points that seem to match up, I can't get a sample to loop properly. "Crossfade" functioning would make this easier, but the MPC doesn't have this right, unless I'm missing something?

Any tips on how to get this to work?
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By Yoshimi Wed Dec 14, 2005 12:22 am
Do you have a computer? Sometimes chopping loops in a two track audio editor is the way to go. If not, it just takes practice.
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By naugie Wed Dec 14, 2005 12:24 am
i use trim and window mode for the start and ends. i use pads13-16 for preveiwing my sound, if i can rarely see the wavform i use normalize and if that still doesnt do it i use log. then while still in trim i find the sound that sample then i switch to the end and find the begining of the first sound that started the sample. use the preveiw pads to play the sound and use the play loop pad to preveiw ur loop, u dont need to turn on loop to make it loop thats for "note on in program". but ya once the start point and endpoint look alike or similar and u played the loop and no clicks play u got urself a loop.

====you know what i like to know??
i like to know another aproach like mathmatical formluas using samples. heres an example say we didnt have a wavform just samples and we know the samples bpm, how would u go about finding the end point in samples?, remember theres no wavform to look at u got just numbers to work with. and also is there books out there with this technique as well as other techniques? i like to learn more on sampling with formulas.

By peezie Wed Dec 14, 2005 12:52 am
Adjust attack+decay to mimic 'crossfade'.

By CutDaMuzik Wed Dec 14, 2005 6:50 am
naugie wrote:====you know what i like to know??
i like to know another aproach like mathmatical formluas using samples. heres an example say we didnt have a wavform just samples and we know the samples bpm, how would u go about finding the end point in samples?, remember theres no wavform to look at u got just numbers to work with. and also is there books out there with this technique as well as other techniques? i like to learn more on sampling with formulas.


-> Maybe this can help you :
http://www.thewhippinpost.co.uk/tools/b ... lators.htm
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By dubnov Wed Dec 14, 2005 8:44 am
====you know what i like to know??
i like to know another aproach like mathmatical formluas using samples. heres an example say we didnt have a wavform just samples and we know the samples bpm, how would u go about finding the end point in samples?, remember theres no wavform to look at u got just numbers to work with. and also is there books out there with this technique as well as other techniques? i like to learn more on sampling with formulas.[/quote]

Here's the formula for one bar 4/4:

endpoint = 10584000 / bpm

(the number 10584000 is 44100 x 60 x beats per measure x measures)
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By chilom Wed Dec 14, 2005 11:37 am
a really usefull link http://mp3.deepsound.net/eng/samples_calculs.php

complete and accurate.

u can save the page and execute it from a simple browser ( its in javascript) without internet
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By naugie Wed Dec 14, 2005 2:41 pm
ya calculators are great, but im talkn about the actual steps u manually make without the deepspace calculators or any automated program. dubnov knows what im talkn about, and thanks btw for giving me that one dubnov if u got more please share. as for books on this subject of samples and formulas does anyone know if theres books on this?
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By dubnov Wed Dec 14, 2005 10:08 pm
ok naugie, some mpc1000 related time savers

- sample length to note length conversion:
(endpoint x bpm) / 27562,5 = ticks

- the exact length of your sequence or song in seconds:
(240 / bpm) x measures = length in seconds

- make your outboard compressor pump with the beat:
6000 / bpm = time of a quarter note in ms

By littlerob Wed Dec 14, 2005 11:41 pm
ah auto bpm detect in the new os will make that tons easier... sometimes timestretch messes samples up too much, would be good just to be able to work out how to pitch things accurately. like using those bpm calculators, definitely very useful
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By naugie Fri Dec 16, 2005 2:54 am
daaamn thanks dubnov :) btw dubnov what are these procedures called in music theory? does it even have a direct name? just curious