Author Topic: Audio player for Casio Prizm  (Read 16463 times)

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Offline Spenceboy98

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Re: Audio player for Casio Prizm
« Reply #30 on: March 02, 2012, 04:18:29 pm »
How do you record music from your calc to the computer? I have a 3.5 to 3.5 cord and a 2.5 adapter.
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Re: Audio player for Casio Prizm
« Reply #31 on: March 04, 2012, 04:03:32 pm »
1.Put the adaptater inside your calc
2.Put the other jack on the Microphone port (the pink/red)
3.Record with good old windows Recorder, or else
4?
5. Profit

Offline alberthrocks

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Re: Audio player for Casio Prizm
« Reply #32 on: March 04, 2012, 04:11:23 pm »
It could be because your song was not maxed out, volume-wise. In Audacity you need to increase its volume (amplification) so it's loud enough, else the static produced by the calc will drown the song.
Nope, I did a full amplification in Audacity, and even allowed clipping.
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Offline Spenceboy98

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Re: Audio player for Casio Prizm
« Reply #33 on: March 11, 2012, 09:31:32 pm »
Any progress? Any new features? MPoupe, you need to add a pause function so if you want to get out during the song, you can.
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Offline MPoupe

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Re: Audio player for Casio Prizm
« Reply #34 on: March 12, 2012, 12:56:23 pm »
Any progress? Any new features? MPoupe, you need to add a pause function so if you want to get out during the song, you can.
No, I had no time to implement anything :-(
BTW: Feel free to modify the player and add any functionality you need (pause included :-) )

Offline Spenceboy98

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Re: Audio player for Casio Prizm
« Reply #35 on: April 02, 2012, 08:54:18 pm »
Here is the CGPlayer with an Overclocked Prizm:



Original Song:

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Offline ProgrammerNerd

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Re: Audio player for Casio Prizm
« Reply #36 on: September 18, 2014, 11:02:47 pm »
Well sorry for the massive bump but I did a little quick work on this and was able to improve the quality simply by using a new algorithm. It is louder and of higher quality with a small side effect of a quite high pitch noise which can be easily solved with an RC low pass filter and/or faster baud rate. I have some recordings as I have a 2.5mm to 3.5mm cable if anyone wants to hear a comparison. Binary:
https://github.com/ComputerNerd/CGplayer/blob/master/CGplayer.g3a
Source: https://github.com/ComputerNerd/CGplayer/blob/master/src/main.c
And for those who don't want to bother clicking on the link here is the new algorithm it is more simple that what was originally used.
Code: [Select]
unsigned samp=gpBuffer[giBufIndex++]>>3;
if(giBufIndex>=giLength)
return;
unsigned x;
for(x=0;x<4;++x){
if(samp>7){
SCIF2.SCFTDR=255;
samp-=8;
}else{
SCIF2.SCFTDR=ptab[samp];
samp=0;
}
while((SCIF2.SCFDR.WORD >> 8)>=15);
}
Also it uses this table
Code: [Select]
static const unsigned char ptab[]={0,1,3,7,15,31,63,127};

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Re: Audio player for Casio Prizm
« Reply #37 on: September 18, 2014, 11:33:15 pm »
Interesting, I will have to find my cable to hear how it sounds like now. :)
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Offline ProgrammerNerd

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Re: Audio player for Casio Prizm
« Reply #38 on: September 19, 2014, 06:51:17 pm »
Alright tell me how it sounds.