In this tutorial, I will take the bass drum of “Auf Wiedersehen Monty” from Rob Hubbard as an example this tune impressed me so much in the 80s, that I was never be able to forget those groove drums. If you know the time where the sound is played, the appr. Well, it’s difficult to extract the bass drum itself, since other sounds are played at the same time. Ripping typical C64 drum sounds by viewing waveforms The creation of wavetables might look like high alchemy, but the usage is very easy and opens a high potential for new sounds once you know the basics. Are you missing something?

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The method described above is not ideal to copy a wavetable sound 1: For those who are interested, here an explanation of the value changes at channel 2.

Ripping by tracing SID register changes The method described above is not ideal to copy a wavetable sound 1: The beginning of the file, and the rightmost “channel 3” and “filter” column are cutted out to improve the layout of this page For those who are interested, here an explanation of the value changes at channel 2.

The term “wavetable” is used by the C64 community for a synthesis method, where the waveform and frequency of a SID voice is modulated so fast, that the resulting output sounds like a new waveform, which is originally not provided by the soundchip itself.

This is also the explanation, why most preset sounds of the “common” MIDIbox SID don’t use release – it adds an unexaptable latency, which can only be compensated by playing the MIDI notes 30 mS earlier no problem with todays host sequencers, but difficult if played liveor by cutting the initial delay from the recorded sample. Play some notes on the keyboard to try out the sound.

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In this tutorial, I will take the bass drum of “Auf Wiedersehen Monty” from Rob Hubbard as an example this tune wavetwble me so much in the 80s, that I was never be able to forget those groove drums. Back to the bassdrum – these are the register changes which SIDdump has traced: After the SIDdump trace output has been written into an immediate file: Ripping typical C64 drum sounds by viewing waveforms The creation of wavetables might look like high alchemy, but the usage is very easy and opens a high potential for new sounds once you know the basics.

If you feel confused, just go wavetablw to the next chapter, where a simplified method is described.

Wavetable Sounds Tutorial #1

Well, it’s difficult to extract the bass drum itself, since other sounds are played at the same time. Such a limitation is suboptimal if a whole drumset should be tuned for the song, therefore I’ve implemented an alternative firmware which is optimized for drums: But there is help: Yes, the triangle waveform is not visible!

And this is how wavetabld waveform, played by a hardware-SID, finally looks like: CC 17 of a single voice. Yes – this is possible by wavetale a trace tool.

Wavetable Sounds Tutorial #1

This delay can be completely eliminated by setting the ADSR release rate to 0. CC 33 and the transpose value OSC1 transpose: Here finally a view on the emulated bass drum, which starts at 0: In order to get a period of 20 mS, the appr. The beginning of the file, and the rightmost “channel 3” and “filter” column are cutted out to improve the layout of this page.

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CC 19it’s easier to calculate the differences between the numbers in the “Abs” column: In the first row you can see: This makes it difficult to locate the waveform and to differ it from the audio sum. The creation of wavetables might look like high alchemy, but the usage waetable very easy and opens a high potential for new sounds once you know the basics.

In order to reconstruate this waveform, first you have to select the same wavetable rate. Play C-3 the “middle note” on the keyboard – you should hear exactly the bassdrum of the. The script can be downloaded from this location.

We notice following parts: Three tracks of up to 32 steps are available, which can control 3 different CCs. They can be learned from existing SID tunes. Are you missing something? Another interesting usage of the wavetab,e third track is the modulation of a LFO or envelope parameter; it should also be mentioned, that the wavetable sequencer can be used to play notes and arpeggiator phrases – the appr.

Wouldn’t it be better to extract the values which are written into the SID sound registers directly from the.