Thanks Miller. Looks promising :) On Tue, Mar 31, 2015 at 11:17 AM, Miller Puckette <[email protected]> wrote:
> Hi all - > > There's an example in B16.long-varispeed.pd that shows how you can use > offsets > into long arrays - this allows you to use the signal input within a smaller > range (ideally < 1 second) to get accurate addressing. > > cheers > Miller > > On Tue, Mar 31, 2015 at 11:07:52AM -0400, William Huston wrote: > > I have a related question. > > > > I am intermediate PD programmer, about 9 months into patching. > > I really love PD, despite some quirks. > > > > The single most annoying issue I have found so far is the inability for > PD > > to accurately index into large arrays. > > > > The way this manifests is very curious! I first noticed high frequency > > noise at maybe 6 min. into an array, which gets worse as you move into > the > > file. At 20 min, it's really horrible. > > > > I would say the root cause is > > > > a) lack of a long integer datatype. Friends, sometimes you really want > > ints, like accurately indexing into an array, and > > > > > > b) lack of precision in (short) floats. > > > > People on the FB group promptly told me this is a well-known issue, and > > directed me to PD-double. This sounds like a wonderful project, however > it > > seems it is only beta, and breaks several of the modules in extended. > > > > So I am wondering 2 things: > > > > 1) What solutions have people come up with for accurately reading big > > arrays at audio rate, using either pd-extended or vanilla? > > > > (I have considered breaking the big file up into smaller arrays, but this > > is cumbersome). > > > > 2) What is the long-term goal at solving this problem? > > > > Thanks :) > > > > > > > > > > > > > > > > > > On Tue, Mar 31, 2015 at 5:51 AM, peiman khosravi < > [email protected]> > > wrote: > > > > > Sorry, forgot to reply to all. > > > > > > Hello, > > > > > > I had this problem in maxMSP recently and found a working solution. > Note > > > that I was only on a laptop so I don't know how relevant this is to > your > > > question. Below is the solution I found on the Max forum (I don't have > the > > > link right now but it should come up on google). > > > > > > 1- Read the file [silently] from disk (using sfplay~ or equivalent), > at 50 > > > times the original speed and record the output into a buffer that is 50 > > > times smaller than the original file. > > > > > > 2- You can navigate through this smaller buffer and multiply the > output by > > > 50 to get the correct time pointer into the original file. I then read > the > > > original file from the disk, instead of loading it into a buffer. > > > > > > 3- Since I'm making my patch for concert playback, I have put in place > a > > > checking mechanism that looks for an existing 'waveform' file. (The > patch > > > automatically names these originalFileName.wave.aif.) If it exists, the > > > waveform file is read into the buffer, otherwise, the loaded soundfile > is > > > 'analysed'. > > > > > > I can send you my patch if you are interested. I don't see any reason > why > > > this can't be implemented in PD. Although the graphical scrolling > might be > > > slower in PD. I'd be interested to know if this works in PD. > > > > > > Best, > > > Peiman > > > > > > > > > > > > > > > *www.peimankhosravi.co.uk <http://www.peimankhosravi.co.uk> || RSS > Feed > > > <http://peimankhosravi.co.uk/miscposts.rss> || Concert News > > > <http://spectralkimia.wordpress.com/>* > > > > > > On 31 March 2015 at 10:18, Stefan Tiedje <[email protected]> > > > wrote: > > > > > >> Hello list, > > >> might well be the first post here, though I am well experienced in > > >> Max/MSP... > > >> As there is no way to get Max patches run on mobile devices, I want > to do > > >> it in PD using the MobMuPlat apps for Android/iOS. > > >> The task would be to simply to play a stereo sound file, but of about > one > > >> hour lebgth. As MobMuPlat only supports vanilla PD I am restricted to > that > > >> as far as I know. > > >> In the docs and on the net I did not find any way to navigate within > that > > >> playback. (Its crucial for rehearsals.) The size is too big for > loading it > > >> into RAM (the mobile devices which are around often have less than 1 > GB of > > >> RAM), Is there a known way to tackle this seemingly simple task??? > > >> A tedious way, I want to avoid, would be to split the sound file into > > >> pieces, which would at least let me jump in at specified places, but > that > > >> would eat up the space on the device, as each piece would have to play > > >> until the end... > > >> Of course I would also love to find a way to play back an mp3 and > freely > > >> navigate within that as well... > > >> Any hints how to proceed are appriciated... > > >> > > >> Stefan Tiedje > > >> > > >> -- > > >> Les Ondes Memorielles--------x-- > > >> -_____-----------|-----------|-- > > >> -(_|_ ----|\-----|-----()------- > > >> - _|_)----|-----()-------------- > > >> ---------()----------TJ Shredder > > >> http://tjshredder.wordpress.com/ > > >> > > >> _______________________________________________ > > >> [email protected] mailing list > > >> UNSUBSCRIBE and account-management -> http://lists.puredata.info/ > > >> listinfo/pd-list > > >> > > > > > > > > > _______________________________________________ > > > [email protected] mailing list > > > UNSUBSCRIBE and account-management -> > > > http://lists.puredata.info/listinfo/pd-list > > > > > > > > > > > > -- > > -- > > May you, and all beings > > be happy and free from suffering :) > > -- ancient Buddhist Prayer (Metta) > > > > Don't forget to sign the > > > > *Pledge to Resist* > > > > *the Constitution Pipeline:* > > > > - *The Pledge: TinyURL.com/Pledge2ResistCP > > <http://TinyURL.com/Pledge2ResistCP>* > > - *More info: TinyURL.com/Pledge2ResistCP1 > > <http://TinyURL.com/Pledge2ResistCP1>* > > > _______________________________________________ > > [email protected] mailing list > > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > > -- -- May you, and all beings be happy and free from suffering :) -- ancient Buddhist Prayer (Metta) Don't forget to sign the *Pledge to Resist* *the Constitution Pipeline:* - *The Pledge: TinyURL.com/Pledge2ResistCP <http://TinyURL.com/Pledge2ResistCP>* - *More info: TinyURL.com/Pledge2ResistCP1 <http://TinyURL.com/Pledge2ResistCP1>*
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