Pulse Wave Help - FamiTracker

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## Pulse Wave Help

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devastat0r
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### Pulse Wave Help

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Post by devastat0r » Sun Sep 04, 2016 11:56 pm

I'm new to FT and pulling my hair out over one simple thing.
I just want to know how to generate the same waveforms that are generated by the pulse channels for both the 2A03 and the VRC6 channels. Let's say if I want to generate those in a VST in FL Studio if I want polyphonic chord support (NOT monophonic arpeggio emulation it sounds different and I don't personally like it).
Let's start with the waveforms for the default instruments.
Even better would be understanding the timbre waveforms too, but I'll save that question for later.
I tried looking through the docs and didn't see what I needed, but maybe I'm not looking in the right place.
I haven't looked at the source yet but I'm sure it would take me lots of time just to find answers to some questions. Also I read somewhere it was MFC which would take me some time to decipher.
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Drillimation
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### Re: Pulse Wave Help

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Post by Drillimation » Mon Sep 05, 2016 11:22 am

The 2A03 has four waveforms, while the VRC6 has eight waveforms. To change the waveform, use the Vxx effect.
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devastat0r
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### Re: Pulse Wave Help

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Post by devastat0r » Mon Sep 05, 2016 7:02 pm

> Drillimation wrote:The 2A03 has four waveforms, while the VRC6 has eight waveforms. To change the waveform, use the Vxx effect.

Any way to see how those waveforms look like? Not sure if there's some kind of good sound analyzer out there.
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Drillimation
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### Re: Pulse Wave Help

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Post by Drillimation » Tue Sep 06, 2016 12:56 am

The pulse can only produce square waves, while the triangle is typically used for the low base notes.
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BioMechanicalDude
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### Re: Pulse Wave Help

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Post by BioMechanicalDude » Tue Sep 06, 2016 9:08 am

The 2A03 has four pulse waves: 12.5% Pulse, 25% Pulse, 50% Square Wave and 75% Pulse, which is the same as 25%. The VRC6 has 8 duty settings, ranging from 6.25% Pulse to 50% Square Wave. You can emulate all of these with any VST that has PWM (Pulse-Width Modulation). Synth1 has it, but you can also use any regular Commodore 64 VST for this purpose.
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Stratelier
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### Re: Pulse Wave Help

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Post by Stratelier » Wed Sep 07, 2016 1:08 am

> BioMechanicalDude wrote:...75% Pulse, which is the same as 25%....

Yes, 75% is just an inverted 25% and by itself it sounds the same, but if you have a rapidly changing volume envelope then you will notice a small difference between the two.
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HertzDevil
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### Re: Pulse Wave Help

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Post by HertzDevil » Wed Sep 07, 2016 1:24 am

Check the FamiTracker wiki maybe?
If all you want are a bunch of pulse wave generators you probably don't even need VSTi's in FL Studio to do it. You only need the source code if you have to improve accuracy (like period quantization, or mixing behaviour, or other caveats) in an environment not designed for that.
By the way, the sound emulation code in FamiTracker is written for Blip_Buffer, which has nothing to do with whether it is used in a MFC application.
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