Author Topic: Sound for calculators with bad ram  (Read 35495 times)

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Offline JosJuice

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Re: Sound for calculators with bad ram
« Reply #60 on: November 25, 2010, 11:13:51 am »
Hmm, just got this from ticalc and I could use some help locating some castlevania wavs x.x

I tried everywhere and could use some help. thanks in a advance
Do you have any non-wav Castlevania music? Converting might be simpler than finding existing wav files.

Offline DJ Omnimaga

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Re: Sound for calculators with bad ram
« Reply #61 on: November 25, 2010, 08:46:48 pm »
If you  find MP3s, you could just use Audacity software and convert them to WAV files.

Offline qazz42

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Re: Sound for calculators with bad ram
« Reply #62 on: November 25, 2010, 08:50:44 pm »
If you  find MP3s, you could just use Audacity software and convert them to WAV files.

ohh, audacity can do that? :O

thanks!

Offline Happybobjr

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Re: Sound for calculators with bad ram
« Reply #63 on: November 25, 2010, 09:01:50 pm »
what exactly is meant by "bad ram" ?
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Offline calcdude84se

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Re: Sound for calculators with bad ram
« Reply #64 on: November 25, 2010, 09:04:43 pm »
That they only have 48KiB of RAM (as opposed to previous hardware versions which had 128KiB)
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Offline Happybobjr

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Re: Sound for calculators with bad ram
« Reply #65 on: November 25, 2010, 09:06:52 pm »
do you mean the ones w/o the extra ram pages?
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Offline calcdude84se

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Re: Sound for calculators with bad ram
« Reply #66 on: November 25, 2010, 09:12:16 pm »
Exactly :)
They only have 3 RAM pages instead of 8.
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Offline DJ Omnimaga

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Re: Sound for calculators with bad ram
« Reply #67 on: November 25, 2010, 09:25:11 pm »
If you  find MP3s, you could just use Audacity software and convert them to WAV files.

ohh, audacity can do that? :O

thanks!
You may need Lame MP3 encoder, but maybe not, since I recall Audacity being able to import MP3s without it. It's to export to MP3 that you need it, if I remember.
« Last Edit: November 25, 2010, 09:25:30 pm by DJ Omnimaga »

Offline qazz42

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Re: Sound for calculators with bad ram
« Reply #68 on: November 25, 2010, 09:30:28 pm »
perfection! Got it to work! thanks guys!

Offline DJ Omnimaga

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Re: Sound for calculators with bad ram
« Reply #69 on: November 25, 2010, 09:33:29 pm »
Glad to hear! Keep in mind only like 1 minute of audio will fit on a 84+SE, though. I wonder if this could work with USB8x?
« Last Edit: November 25, 2010, 09:33:38 pm by DJ Omnimaga »

Offline FloppusMaximus

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Re: Sound for calculators with bad ram
« Reply #70 on: November 25, 2010, 11:14:00 pm »
Glad to hear! Keep in mind only like 1 minute of audio will fit on a 84+SE, though. I wonder if this could work with USB8x?
Interesting question.  Maybe.  USB itself would certainly be fast enough, and I assume most Flash drives would be fast enough; the question is whether the calculator CPU is fast enough to push the bits around at the required rate.  I'm wondering whether you would need to buffer the data, or whether you could, through some extreme wizardry, read the bytes directly from the USB controller.  Either way, it would be an interesting and tricky program to write.

Offline DJ Omnimaga

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Re: Sound for calculators with bad ram
« Reply #71 on: November 26, 2010, 12:26:58 am »
Yeah my concern was how fast could the calc could read the sound data from USB. Maybe quality could be decreased more, but at 4 bit it starts sounding weird and under that it just sounds awful.

Offline thepenguin77

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Re: Sound for calculators with bad ram
« Reply #72 on: November 26, 2010, 01:03:07 am »
I think it could be possible, it would just have to be a lot quieter. I currently use 2 t-states to differentiate between byte values. So that steals 512 t-states from my 696 t-state loop leaving me with 184 t-states. But only about 100 of those are usable. At this rate, I don't think usb communication would be possible. But, if I change it to 1 t-state per byte value. That would free up an extra 256 t-states. With 356, there is probably enough time to read stuff off of a flash drive. The only cost is that since all of the voltages are closer together, there would be less sound produced.
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Re: Sound for calculators with bad ram
« Reply #73 on: November 26, 2010, 01:04:44 am »
Ah ok, so it would be something involving sound volume? Or do you mean lowering quality would make it quieter?

Offline thepenguin77

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Re: Sound for calculators with bad ram
« Reply #74 on: November 26, 2010, 01:09:17 am »
It would be quieter because there would be less time devoted to actually playing the music. The way it is now, 3/4 of the time is spent messing with the link port, and the other 1/4 is used to get the next byte. But if I need to take longer to get the byte, that means that only 1/3 of the time is used to mess with the link port.

So basically, just to put some random numbers in, instead of the voltage range being 1-5 V, it's now 2-4 V since it's being changed very quickly.
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