Hi all,

I'm working (and learning) on my first pd patch. I am trying to build a sampler and I want to control the starting and the ending point of the sample in real-time. I've read the pd's help but I didn't find anything that could help me to build something similar.

My patch for the moment is simply:

[1( [0(
| /
[readsf]----[open... .wav(
|
[dac]

I would like the sample to play in loop when it reaches the end.

Thank you all, for your help!

Thank you both for you help!

Hi all! I've built a little sampler (copied and modified from a tutorial) but I've some problems with it. I'm sure it is something easy to solve but at the moment I can't understand how. If someone could help me it would be great!

The problems are the followings:

1. Understanding how to make the sample to play at his original speed (straight and reverse) when I press the buttons over and under the comment "velocità normale".

2. Making the hsliders "inizio loop" and "fine loop" not to cause awful noises when I move them. I tried to put [line]s everywhere but I did not find the solution.

3. I don't know if it is possible... But is there a way to do not have the audio stopping and noise glitches when i load a sample ("carica audio" button) in an glitchsampler while another one is playing?

Here's my little patch, thanks a lot for everyone will help me!

And... hem. The patch sometimes does not start. I can't understand why >:(

http://www.pdpatchrepo.info/hurleur/glitchsampler1.pd

1. Make sure that [phasor~] is playing back at the right speed and that the loop length is set correctly. All this can be derived from the output of [soundfiler] (numberOfSamples) and the sampleRate (make sure Pd is set to the same as the file's sampleRate).

(Note: [phasor~] needs a frequency value to set it's playback speed)

playbackSpeed (Hz) = sampleRate / numberOfSamples

For setting the correct loop length (Note: [phasor~]'s output is from 0 to 1)

readPosition (input into [tabread4~] = phasorOutput * numberOfSamples

2. Use [line~] or [vline~] instead

3. I don't believe it's possible to get around that

Thank you Jwif!

I am sorry but I do not understand how to do the 1st point. I tried to put the result of [expr 44100 / $f1] in the inlet of the hslider "vel. riproduzione" and to activate the message with the but it didn't work...

I'm not entirely sure what vel.riproduzione is meant to be doing but I've attached a patch that implements the first point.

Cheers,
Joe

http://www.pdpatchrepo.info/hurleur/phasorLooping.pd

"vel. riproduzione" is the speed of the sample playing, now I'll check your patch, thanks!

Ahh realised you have start and end points as well. Here's a patch that implements those.

It starts to get tricky when you go down that route with [phasor~] because its constantly cycles through the table, unless you set the frequency to 0. The main problems are that the start and end points affect the playback speed and changing a value will likely result in a weird audio artifact, or that might be your sort of thing

Another option is to use [vline~] to generate the tableIndex, where you send it a 'packet' of all the information necessary for playback: i.e. startPosition, endPositon, timeTaken.

You'll use all the same calculations but the patch will work in a slightly different way. With [vline~] you can have a greater degree of control of when the sample plays.

http://www.pdpatchrepo.info/hurleur/phasorLoopingAndOffset.pd

Ohh that's great! This patch is really cleaner than my glitchsampler!

I'll keep the dirty effect of changing speed on mine and I'll modify the rest. With this patch changing the starting-ending point does not cause any noisy-glitchy (unwanted) sound! But it is true, they affect the sample speed... I must find a way to fix this...

Thank you very much Jwif, your attachment was perfect!

I tried.

phasorLoopingAndOffset is too much smooth for me. I just need to find the way to play a sample at his original speed in my patch...

To keep your playback speed the same you'll have to modulate your speed modifier by a ratio of the loop length to your total sample length.

So:

playbackSpeed (Hz) = (sampleRate / numSamples) * (speedMultiplier * ( numSamples / abs(endPosition - startPosition))

I'll let you work out how to put that into your patch, it's fairly simple

You're my master Jwif