hi list,
i want to play 48 samples (12 quadrophonic) in pd, each about 4 min at 44.1 kHz.
i am using the tabplay~ object to play out of 48 arrays. it takes alot of time to load the samples in the arrays.
what is the best way to load the samples into the arrays in less time? is it more efficient to use 4 channel audio files with soundfiler?
joe
Hallo Johannes!
i am using the tabplay~ object to play out of 48 arrays. it takes alot of time to load the samples in the arrays.
what is the best way to load the samples into the arrays in less time? is it more efficient to use 4 channel audio files with soundfiler?
I don't know but I don't think that this will make much difference - it takes some time till you copy the data in memory ... However, you can also try to stream it directly from the harddisk with [readsf~] - then you don't have to load them at all !
LG Georg
Georg Holzmann schrieb:
Hallo Johannes!
i am using the tabplay~ object to play out of 48 arrays. it takes alot of time to load the samples in the arrays.
what is the best way to load the samples into the arrays in less time? is it more efficient to use 4 channel audio files with soundfiler?
I don't know but I don't think that this will make much difference - it takes some time till you copy the data in memory ...
hm ... I meant it WON'T make much difference !
Georg Holzmann schrieb:
Hallo Johannes!
i am using the tabplay~ object to play out of 48 arrays. it takes alot of time to load the samples in the arrays.
However, you can also try to stream it directly from the harddisk with [readsf~] - then you don't have to load them at all !
LG Georg
gruss georg,
i want to loop 4*4 samples at the same time. will readsf~ be good for that?
Hallo, Johannes Krause hat gesagt: // Johannes Krause wrote:
Georg Holzmann schrieb:
Hallo Johannes!
i am using the tabplay~ object to play out of 48 arrays. it takes alot of time to load the samples in the arrays.
However, you can also try to stream it directly from the harddisk with [readsf~] - then you don't have to load them at all !
LG Georg
gruss georg,
i want to loop 4*4 samples at the same time. will readsf~ be good for that?
It depends: You can just reopen the files of course. remeber to first send the "open ..." command before sending another 1 to resume playing. If this will be smooth depends on your material, but maybe you can mask the transition a bit, for example by using two readsf~ to play the same file and start them slightly shifted (maybe prepare your soundfiles accordingly).
Another possibility is for example illustrated in the class material Tom Erbe just posted: It shows how you can load only part of a sample into a table. See: http://music.ucsd.edu/~tre/172/w6a-soundfilerbuffering.pd http://music.ucsd.edu/~tre/classblog.php
(Probably works best with a threaded soundfiler.)
And finally you can combine the partial soundfiler loading ("-skip ...") with readsf~ playing by loading e.g. the beginning of a sample into a table and then switch over to playing the rest of the sample from disk with readsf~. You can do this to smooth out possible loop-point clicks as well by fading out readsf~ and switching over to table-playing again.
Lots of possibilities, some slightly hackish, but that's part of the fun.
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__
Frank Barknecht schrieb:
Hallo, Johannes Krause hat gesagt: // Johannes Krause wrote:
Georg Holzmann schrieb:
Hallo Johannes!
i am using the tabplay~ object to play out of 48 arrays. it takes alot of time to load the samples in the arrays.
However, you can also try to stream it directly from the harddisk with [readsf~] - then you don't have to load them at all !
LG Georg
gruss georg,
i want to loop 4*4 samples at the same time. will readsf~ be good for that?
It depends: You can just reopen the files of course. remeber to first send the "open ..." command before sending another 1 to resume playing. If this will be smooth depends on your material, but maybe you can mask the transition a bit, for example by using two readsf~ to play the same file and start them slightly shifted (maybe prepare your soundfiles accordingly).
Another possibility is for example illustrated in the class material Tom Erbe just posted: It shows how you can load only part of a sample into a table. See: http://music.ucsd.edu/~tre/172/w6a-soundfilerbuffering.pd http://music.ucsd.edu/~tre/classblog.php
(Probably works best with a threaded soundfiler.)
And finally you can combine the partial soundfiler loading ("-skip ...") with readsf~ playing by loading e.g. the beginning of a sample into a table and then switch over to playing the rest of the sample from disk with readsf~. You can do this to smooth out possible loop-point clicks as well by fading out readsf~ and switching over to table-playing again.
Lots of possibilities, some slightly hackish, but that's part of the fun.
Ciao
hey list,
i ve tried 2 options to play at least 7 quad-samples out of the arrays.
first way is to play the sample with readsf~ and write it straight into 4 arrays with tabwrite~. when readsf~ finished then start play out of the arrays. this needs a lot of time to start playing - maybe depending on the length (each quad-sample is 90 sec) - and interrupts before it plays out of the arrays.
second way based on
http://music.ucsd.edu/~tre/172/w6a-soundfilerbuffering.pd
...is to use the soundfiler wich gets 2 messages by a bang and reading the same quad-sample into 8 arrays (2 buffer, each buffer 4 arrays) and switch betrween them at a specified sample. (in this case 661500 samples)
so when i try to play 7 samples, iam going to read in 56 arrays at same time, with tabplay~ it needs 10 sec to start playing.
when i read the second buffer later the the the first one it takes about 5 sec to play and it interrupts at the transition.
any idea to handle that kind of problem?
other ways to get much better results?
thanks and shouts . joh
Hallo, Johannes Krause hat gesagt: // Johannes Krause wrote:
so when i try to play 7 samples, iam going to read in 56 arrays at same time, with tabplay~ it needs 10 sec to start playing.
when i read the second buffer later the the the first one it takes about 5 sec to play and it interrupts at the transition.
any idea to handle that kind of problem?
other ways to get much better results?
As you use tabplay~ and thus no change of speed, you can mask the loading time of [readsf~] by preloading the beginning of a sample into a table, play this with tabread4~, while readsf~ is still loading the file, and then switch over from tabread4~ to readsf~ after a certain time. See attached harddisk sample player for an implementation in mono. For 4-channel playback you need to modify this of course. Note that it assumes that your sample has a samplerate of 44.1 kHz and that Pd is running at 44.1 kHz as well, because readsf~ always plays with Pd's samplerate.
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__
Hallo, Frank Barknecht hat gesagt: // Frank Barknecht wrote:
As you use tabplay~ and thus no change of speed, you can mask the loading time of [readsf~] by preloading the beginning of a sample into a table, play this with tabread4~, while readsf~ is still loading the file, and then switch over from tabread4~ to readsf~ after a certain time. See attached harddisk sample player for an implementation in mono. For 4-channel playback you need to modify this of course. Note that it assumes that your sample has a samplerate of 44.1 kHz and that Pd is running at 44.1 kHz as well, because readsf~ always plays with Pd's samplerate.
Small addition: Because of tabread4~'s interpolation it's probably better to load some more samples into the table with soiundfiler, like 44103 instead of 44100.
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__
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Frank Barknecht -
Georg Holzmann -
Johannes Krause