[Csnd] csound web and local file

The Csound Mailinglist
1

Hi All,
i'm starting to explore web Csound as real newbie in web technologies so
i'm in trouble with access to local file. I would like to have csd file as a separate file
and i also have a wav sample that i need but i do not really know how can i do.

Someone has some hint for me?
Thanks,
ciao,
francesco

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2

Uhm, with a GUI frontend (I use CSoundQt on Linux) you can write and read .csd files and render .wav (and .ogg).

3

Hi Francesco,

This project might give you hints on what to do as it loads samples and has a CSD maintained separately:

https://github.com/kunstmusik/webaudio-csound-samples-example

Let me know if you have any questions!
Steven

4

Writing from a position of ignorance but the basic system supports #include of both orchestra and score and so a dual file orc/sco can masquerade as a csd in
<CsoundSynthesizer>
<CsInstruments>
#include "foo.orc"
</CsInstruments>

<CsScore>

#include "foo.sco"
</CsScore
</ScoundSyntheizer>

Also samples can be encapsulated in the csdfile with <CsFileB> which takes a base64 encode file and creates a local copy at render time.

I have no idea if these work in the web-base versions. I would like to know too.

5

Other than John’s second suggestion, I’m not aware of any way you can work on the Web with anything but a single .csd file - no sample files, etc. Even the powerful Csound IDE doesn’t currently allow sample files to be loaded into a “project.” For that matter, you can’t “upload” anything to the IDE except by copy/paste - which won’t help you much with samples. Right now there is a general problem getting files in and out of Web apps, both locally and into the cloud. Hopefully, such “handshaking” will improve in the future - especially in the IDE.

I face the same kind of issue with MIDI (live) input. Currently, Csound IDE is the only Web-based resource that has implemented MIDI input. The various currently available Web-based resources are either very limited in what they can do, or tend to be quite self-contained. The following website is the one exception to this situation (https://thumbsdb.herokuapp.com/csound/), but unfortunately it won’t handle either MIDI data, or other than .csd files.

Art Hunkins

6

That’s simply not true. The example I posted shows how to use samples and you can put whatever you need on the virtual file system. This is what allows #include to work on the Csound Web-IDE, which also allows samples to be uploaded:

https://ide.csound.com/editor/5CrtXY1UKEdYA2mf1UoS

Just use “File -> Add File” and choose a file to upload.

7

Does this work with the AudioWorklet build of Csound? The AudioWorkletProcessor runs in its own JavaScript context.

8

Yes.

9

OK, I looked at the sample project. That’s clear enough, thanks.

10

Thanks for the correction, Steven. I’m very happy that I was wrong on this topic; this apparent “file limitation” had really bothered me.

Frankly I was confused by the terminology; “Add File” just didn’t register. I’m more familiar with “Load”, and for that matter, “Save” - which usually refers to “file it elsewhere” (either to my computer or to the cloud), not remaining within the “project” (another new, and here essential, term).

As found in Audacity, I would rather prefer the terms “Import” and “Export” to be used in the IDE, and I’d particularly like a separate “Export .csd” option, along the lines, recently discussed, of a simpler “IDE Light”. As it is, I feel neophytes (and perhaps old-mode Csounders like me), can be overwhelmed by the IDE, and find ourselves looking for more basic Web-based alternatives.

Art Hunkins