Re: [chuck-users] how is this "on the fly"?

Hi, On 9/17/07, AlgoMantra wrote: [snip]

Allow me to restate my objective. I want "to read the sound of a live flute off the audio port in realtime, and analyse it using Python". Now...

What I don't understand is why do you learn CSound, SuperCollider, ChucK if all you want to do is use Python?

This is a reply to me from one of the main PySndObj developers:

thinking a little more about this, I think there is no pitch tracker there (I need to add one...). So you can try csound:

See that? at least he understood my question somewhat.

The question is a little vague so he pointed you in *one* direction.

Now here's a response from the gentleman at Pymedia:

Can you please check voice_recorder_player.py or voice_recorder.py from examples tar ball ?May be it will resolve most of the issues. He is answering a completely different question! I'm talking about intercepting data off a port, and he's talking of recording it.

I think you are misunderstanding. He is telling you to look into the recorder example so that you can see how to capture live audio.

I had seen the example he's talking about but it made no sense in the context.

Which context? The context of capturing real-time audio? Or the context of doing "an analysis" on the signal. It certainly makes no sense in the latter but a lot in the former.

And I was kinda lucky in that I know what a tarball is

You mean you acquire knowledge through luck? Or am I misunderstanding something.

- most artists who dabble in technology come from diverse background. ( I am one of the 2 or 3 new media artists in India). So I find it odd that when newbies ask questions, developers answer very sweetly, but in code.

All artists come from diverse backgrounds. And regardless of what you dabble at, you still have to follow the learning path, especially if you want to become somewhat proficient at it. If computers are your thing, you have to learn some basics about the computer and operating systems and how to use different applications. If you are proficient enough with computers to start coding audio applications in python and you don't state your background but, instead, you ask a vague question, it is understandable that developers assume that you know what you're talking about. If you need hand-holding, which all newbies of the world need, you have say so and state your problem with as much precision as possible so that those who would like to help you do not need to do much guess work. Now, do you mean there are only 2-3 new media artists in India? Strange. A random Google hit: http://www.newmedia.sunderland.ac.uk/nmcr/india/ilinks.htm suggests that there are a few more.

Perhaps the truth really is that adc => FFT => dac, which is so simple for ChucK etc - has no analog in Python, and people are just too ashamed to admit that they don't know how its done.

I never used Python for audio but I would assume that it, in fact, is possible. In any case, I find it hard to believe that after having learned CSound and SuperCollider you have not been able to achieve you goal of reading live flute and analysing it (I don't know what kind of analysis you want to do and what you want to use the analysis data). Have you looked at Pure data? puredata.info. Perhaps this is a little more high-level than CSound or SC (or even chuck). Also, there are python wrappers for csound so you can script the csound shebang with python, if you're so inclined. So, if PySndObj doesn't cut if for you, do it with pyCSound.

To use Chuck to do this, I will need to learn YET ANOTHER LANGUAGE called OSC or something, which will talk to messages from Python (which are messages originating in my phone coming via Bluetooth) so I can pretty much give up on realtime.

OSC is a protocol. It should not be needed for such simple task as reading the audio port, analysing the signal and (insert your action here). However, if you intend to control your computer by messages you type on your phone, you can certainly forget about realtime, unless you're a hyper-fast phone-keypad-typist.

I hate Python. Ugh, no! I love it, but I hate where I am with this damn project.

Whining is certainly not going to help you. What will help, however, is that you think about what you want to achieve, clearly state your needs, problems and issues and then write to the appropriate mailing list. Regards, ./MiS

*looks despondently at the wall picture of Lord Shiva, who has a familiar serpent tied around his neck like a scarf*

------- 1/f ))) ------- http://www.algomantra.com

On 9/17/07, robin.escalation wrote:

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--- AlgoMantra wrote:

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If you prepare your files and code in advance and then just chuck the shreds in and out of the VM, it really is a a bit like sequencing, rather than livecoding. And if I change the code in the file, save it, then the effects don't appear live, do they?

In my little free time that I am spending with ChucK I am trying to figure this out as well! The best I get is editing one file while another is playing. This feels more like batch programming than real time.

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Maybe i'm missing something freakin obvious, but I'm so frustrated having had to learn Csound, Chuck, SuperCollider and all sorts of new languages just because Python did not provide me with a simple audio processing module. All I wanted to do using Python was analyse the sound of a live flute playing and plot its frequency, and other characteristics, straight off the audio port.

It is annoying that no-one has wrapped a decent library for Python. But haver you checked out my article on this topic? It could be that if you have simple needs PyMedia or one of the other mentioned tools might do.

Surf:

http://diagrammes-modernes.blogspot.com/2007/08/music-control-tools-python-b...

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-- robin

----- Robin Parmar robinparmar.com _______________________________________________ chuck-users mailing list chuck-users@lists.cs.princeton.edu

https://lists.cs.princeton.edu/mailman/listinfo/chuck-users

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