Re: [pygame] mixer/sndarray voes

[Olof Bjarnason <olof.bjarnason@xxxxxxxxx>]

2010/1/27 René Dudfield <renesd@xxxxxxxxx>:
>
>
> On Fri, Jan 22, 2010 at 7:31 PM, Olof Bjarnason <olof.bjarnason@xxxxxxxxx>
> wrote:
>>
>> OS: Ubuntu 9.04
>> Python: 2.6.2
>> PyGame: 1.8.1release
>>
>> I'm trying to generate some sounds with pygame.
>>
>> I was hindered some by how to use sndarray - but it all got easier
>> once I set the mixer-init to easy/retro defaults.
>>
>> The first experiment was to just play a "sawtooth" wave:
>>
>> <code src="sndtest.py">
>> import pygame
>> import Numeric
>>
>> pygame.mixer.pre_init(11025,8,1,4096) #mono, unsigned, 8-bit sound. C64 ;)
>> pygame.init()
>> print pygame.mixer.get_init() # to make sure I got what I wanted, just
>> watch stdout
>>
>> pygame.sndarray.make_sound(Numeric.array(range(250)*100)).play()
>>
>> while pygame.mixer.get_busy():
>>        pygame.time.wait(200)
>> </code>
>>
>> 'python sndtest.py' produces slightly different audio each time.
>>
>> I improved readability a little, to find out where I did go wrong, and
>> to my great surprise, this *silenced* my speakers:
>>
>> <code src="sndtest2.py">
>> import pygame
>> import Numeric
>>
>> pygame.mixer.pre_init(11025,8,1,4096) #mono, unsigned, 8-bit sound. C64 ;)
>> pygame.init()
>> print pygame.mixer.get_init() # to make sure I got what I wanted, just
>> watch stdout
>>
>> seq = range(250)*100
>> na = Numeric.array(seq)
>> snd = pygame.sndarray.make_sound(na)
>> snd.play()
>>
>> while pygame.mixer.get_busy():
>>        pygame.time.wait(200)
>> </code>
>>
>> 'python sndtest2.py' only produces a low-volume "spark" then nothing
>> each time run.
>>
>> What am I doing wrong here? There is no randomness in 'sndtest.py',
>> and 'sndtest2.py' should at least produce the same output, afaiks.
>>
>> --
>> twitter.com/olofb
>> olofb.wordpress.com
>
>
> hi,
>
>
> here's your example expanded with some of the details commented for you:
>     http://rene.f0o.com/~rene/stuff/sndtest2.1.py

Great!

>
>
> Please use a recent pygame.  sndarray has had bugs fixed since 1.8.1.

I see.

>
> For ubuntu you may have to compile from source, since they still haven't
> updated their package in time for ubuntu 9.10:
>     http://pygame.org/wiki/CompileUbuntu

Um a little too much wrong-kind-of-work to be fun.

>
> However, as of the 14th of jan 2010 it looks like ubuntu has pygame 1.9.1 in
> for the next ubuntu release (10.4)... :)

Great, at last! (however I'm seriously considering dumping Ubuntu for
Archlinux or something. Ubuntu are *too slow updating their package
databases* nowadays..)

>
>
> Also please use numpy instead of numeric... since numpy is the new numeric
> for the past few years.  The most recent sound array examples use numpy.
>

OK.

>
> It may also be worth searching on pygame.org for sndarray examples, and
> looking at the example that comes with pygame.  Also searching with google
> search turns up some results.
>
> http://www.google.com/codesearch?hl=en&lr=&q=file%3A\.py%24+pygame.sndarray&sbtn=Search
>

"file:" googling is neat! Didn't know of that, thanks.

>
>
> cheers,
>



-- 
http://olofb.wordpress.com