On Thu, Jun 7, 2018 at 4:21 AM, Greg Ewing
wrote:
> Alec Bennett wrote:
>
>> 16 bit wav files. 1411 kbps. About 5 megs each but one is very long (a 13
>> minute medley of all of them, 133 megs).
>>
>
> Okay, I didn't realise they were that big -- I was thinking
> short horn sounds, not substantial pieces of music!
It's a "musical horn" in the ice cream truck sense. Plays this for example:
https://www.youtube.com/watch?v=zzodaDCD798
Uses this keypad with a Raspberry Pi:
https://learn.parallax.com/tutorials/language/propeller-c/propeller-c-simple-devices/read-4x4-matrix-keypad
> You bring up a good point, I can certainly make them mono.
>>
>
> Also maybe 8 bit -- a horn probably doesn't need terrifically
> high sound fidelity.
True, but it does seem a shame to have to degrade the sound quality. I'm
calling the project "music box" since I'd like to be able to use it as a
general music clip trigger, like the classic Dr. Sample:
https://www.amazon.com/BOSS-SAMPLE-SP-303-PHRASE-SAMPLER/dp/B0002J1NE6
>
>
> But surely there must be some way to save a preloaded state?
>>
>
> That's over 200MB altogether, which may be why it takes so
> long. Have you tried simply reading all the files to see
> how long it takes?
>
Very good point.
>
> If that takes just as long, then reading a preloaded state
> isn't going to gain you anything -- you've still got over
> 200MB of data to read in.
>
> You could also try using a compressed format such as
> mp3 or ogg/vorbis to see if it loads any faster.
>
I tried MP3, but unfortunately the pygame.mixer.Sound doesn't support it.
The pygame.mixer.music does support MP3, but it doesn't support polyphony.
I wonder if it would be possible to modify pygame.mixer.Sound so it
supports MP3?
I see that pygame.mixer.Sound supports OGG, I guess I should try that. I've
never used OGG before, and I wonder if it supports OGG if MP3 would be an
easy addition?
> Another thought -- instead of loading the medley as a
> separate file, could you assemble it on the fly from
> parts of the others?
>
Yup, should definitely do that. But again, part of me is thinking about
this as larger than just my project. It seems a shame that playing a 13
minute sound file with polyphony should take so long to preload. I get that
in games that's not usually a factor but Pygame is useful for so much other
than games.
>
> Another other thought -- instead of storing entire tunes
> as sound files, just use samples of the horn sounds and
> write a sequencer to play the tunes with them.
Here's a playlist of the old ice cream truck jingles we're playing. This is
for a cart that sells oysters by the way.
https://www.youtube.com/watch?v=zzodaDCD798=PLxDFYmPWdF3DqMkFxwnKPr22r_15-GWne=2s=2
>
>
> --
> Greg
>
