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Noise on expansion chip? Posted: 2015-03-18 11:29 Reply | Quote
Baka94

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#67045
Is it possible to create noise similar to the 2A03 noise using expansion chips? Also, would it be possible to make it "melodic" so that it would have higher range and could be altered with pitch fine and such effects?

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Posted: 2015-03-18 14:06 Reply | Quote
jrlepage
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#67051
The N163 is wavetable based so you can get it to play noise-esque sounds by generating a pseudo-random string of 32 numbers between 0 and 15. It will sound pretty awful at higher octaves though.

Alternatively, a VRC7 patch with feedback cranked up to the max will produce a similar sound to white noise.

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Posted: 2015-03-18 14:23 Reply | Quote
Alexander283

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#67054
5B isn't implemented yet, but it does have a noise generator, too. Just wait till JSR releases the update

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Posted: 2015-03-18 21:28 Reply | Quote
Baka94

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#67075
[quote=jrlepage]The N163 is wavetable based so you can get it to play noise-esque sounds by generating a pseudo-random string of 32 numbers between 0 and 15. It will sound pretty awful at higher octaves though.[/quote]

Yeah, it sounds kinda like V01 type noise.

[quote=jrlepage]Alternatively, a VRC7 patch with feedback cranked up to the max will produce a similar sound to white noise.[/quote]

The noise on this one sounds good, but I can't control the pitch of the noise.

[quote=Alexander283]5B isn't implemented yet, but it does have a noise generator, too. Just wait till JSR releases the update [/quote]

This is the reason I asked. I have been waiting for the 5B expansion chip for quiet a long time now. I wanted to find out if there are any other ways to generate white noise.

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Posted: 2015-03-18 21:43 Reply | Quote
Xiphos2000

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#67077
ImATrackMan is an expert about the 5B chip. I highly recommend you check out his/her channel, there's actually alot of stuff there about the 5B and FT.


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Posted: 2015-03-18 21:53 Reply | Quote
za909

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#67079
[quote=Baka94][quote=jrlepage]Alternatively, a VRC7 patch with feedback cranked up to the max will produce a similar sound to white noise.[/quote]

The noise on this one sounds good, but I can't control the pitch of the noise.[/quote]

You can experiment with Feedback 6-7 and use different modulator volumes and multiplicator values to make the noise sound muddier, it might help to make it more interesting.

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Posted: 2015-03-19 04:30  (Last Edited: 2015-03-19 04:32) Reply | Quote
B00daW

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#67101
[url=http://average.truechiptilldeath.com/ppppp/fuffles.mp3]here i recorded this from hardware a few years ago.

this uses tuned noise instruments with just the 2a03 by using a higher engine refresh rate.

Posted: 2015-03-21 03:53  (Last Edited: 2015-03-21 03:53) Reply | Quote
Im_a_Track_Man

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#67158
[quote=Xiphos2000]ImATrackMan is an expert about the 5B chip.[/quote]
I am by no means an expert on the 5B audio- or memory handling-wise. However, I'd like to think I know quite a lot about about the AY/YM/5B just with now having a bit of hands-on experience with it from both software and hardware standpoints.

Posted: 2015-03-21 04:07 Reply | Quote
Xiphos2000

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#67159
[quote=Im_a_Track_Man] However, I'd like to think I know quite a lot about about the AY/YM/5B just with now having a bit of hands-on experience with it from both software and hardware standpoints.[/quote] Yeah, basically.
BTW, I saw that you were able to get a ZX-Speccy sort of noise sound out of the 5B chip. Does that have anything to do with the 5B chip? Seems sort of relevant here in this thread.

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Posted: 2015-03-21 04:34  (Last Edited: 2015-03-21 04:35) Reply | Quote
Im_a_Track_Man

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#67160
Anyone can get Speccy noises out of the 5B. It's exactly the same chip as in the spectrum. The only noteworthy thing I've done with it is use mode trickery to halve the envelope volume, and that's pretty much useless (and really easy)

Posted: 2015-03-21 04:40 Reply | Quote
Xiphos2000

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#67161
[quote=Im_a_Track_Man]Anyone can get Speccy noises out of the 5B. It's exactly the same chip as in the spectrum. [/quote]
That is something that I did not know. Are there any other types of noises you can get out of 5B?

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Posted: 2015-03-21 04:48  (Last Edited: 2015-03-21 05:14) Reply | Quote
Im_a_Track_Man

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#67162
Not really. Since the clock speed is so low (exactly half of the NES and MSX [also used the AY]), it can't really do ALL of the stuff those chips can. The Atari ST and Spectrum occasionally had it play back samples, and (in 200hz mode) the ST could use the CPU to modulate the volume so you could have crude PWM-like sounds. The NES isn't powerful enough to do those things, but if you removed a 5B from a Gimmick! cart and wired it to an ST with the input clock doubled, it would be 100% functionally identical.

Posted: 2015-03-21 04:57 Reply | Quote
Xiphos2000

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#67163
That's very interesting. I've always thought of composing with Atari ST hardware. Are there any other computers or systems that the 5B chip can do that with?

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Posted: 2015-03-21 05:13  (Last Edited: 2015-03-21 05:17) Reply | Quote
Im_a_Track_Man

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#67165
Famicom
Spectrum (and Russian clones)
Atari ST series
MSX series
Amstrad CPC
Sharp X1
PC-88/98 (built into the FM chip)
Vectrex
Intellivision
A couple of Apple sound cards
Colour Genie
Slot and pachinko machines
Dozens and dozens of arcade machines (Gyruss uses 5 at once)
Probably a lot more I'm forgetting or haven't read up on. You can take your pick.

Posted: 2015-03-21 08:22 Reply | Quote
Xiphos2000

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#67168
I guess that 5B chip has alot of potential, doesn't it?
So far I'm interested in MSX and Atari ST. I see alot of potential in the MSX, and I like how humble the Atari ST is (Jochen Hippel really knew how to get the most out of that computer. Example: [url=]https://www.youtube.com/watch?v=AZ0oOnMRQY0 He also did the ATST version of Turrican II, which is my favorite version of my favorite soundtrack EVER)
I seriously should check out this 5B chip. Seems to have alot of potential.

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