[PD] using puredata to play playlist gapless

[Roman Haefeli]

On Die, 2013-02-19 at 13:55 -0500, Hans-Christoph Steiner wrote:
> Pd will play all files gapless, according to their file length.  The 'gap'
> problem mostly refers to the MP3 format, which encodes the audio in fixed
> frame length.  So if your song doesn't fit neatly into a multiple of the fixed
> frame length, you get a gap, i.e. the leftover part of the last frame is
> filled with silence.  That's a problem with the MP3 format that basically all
> other file formats don't have.

This is nitpicking, but actually most ways to play a sound files in Pd
are not totally gapless, unless the file lengths are exactly a multiple
of 64 samples. This is the case with [readsf~ ], but also with
[tabplay~]. Both start only on block boundaries. The only way (I
currently can think of) to play absolutely gaplessly is to use
[vline]/[tabread~ ] construct.

Roman

 

> On 02/19/2013 12:47 PM, Rick T wrote:
> > Yes I do have the ability to change the playlist file to a text file
> > and alter it how it looks.  The thing I'm looking for is an example of
> > gapless playing.  I couldn't find one doing google search.
> > 
> > Thanks
> > 
> > On Tue, Feb 19, 2013 at 12:53 AM, Roman Haefeli <reduzent at gmail.com> wrote:
> >> On Die, 2013-02-19 at 00:31 -1000, Rick T wrote:
> >>> Greetings All
> >>>
> >>> I have a playlist file (songs.pls) that I would like to play gapless
> >>> (without the 1 second pause between tracks) can puredata due this if so is
> >>> there and example?
> >>
> >> It sounds doable to me. I'd do it with [textfile] reading your playlist
> >> which passes each line (after some message mangling) to a [readsf~]. My
> >> only concern is the chosen file format '.pls'. Pd (natively) is pretty
> >> bad in string parsing. If you could use your own format it would make
> >> things a lot easier. I don't know if you have any constraints there.
> >>
> >> The simplest format of such a text file might be as an example:
> >>
> >> filename1.wav
> >> filename2.wav
> >> whateverfile.wav
> >>
> >>
> >> Roman
> >>
> >>
> >>
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