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If you feel confused, just go further to the next chapter, where a simplified method is described. 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: In order to reconstruate this waveform, first you have to select the same wavetable rate. Back to the bassdrum – these are the register changes which SIDdump has traced: So, why not having a look into the audio sample of this tune played by a original SID?

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Well, it’s difficult to extract the bass drum itself, since other sounds are played at the same time. This is also the wavetablf, why most preset sounds of the “common” MIDIbox SID don’t use release – it adds an unexaptable latency, which can only be wavwtable 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.

The gate is delayed by up to ca.

Try following sequence you can either use the JSynthLib editor, or edit this sequence directly from the SID control surface: This makes it difficult to locate the waveform and to differ it from the audio sum. If you feel confused, just go further to the next chapter, where a simplified method is described.

The parameter changes are stored in a table – that’s the reason for this name – the technique is not related to “wavetable synthesis”, which is based on audio samples. I will create a separate webpage once the firmware is final. 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.

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Another interesting usage of the remaining 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. But the easiest method is just to write the emulated SID output into a. Play some notes on the keyboard to try out the sound. 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.

Wouldn’t it be better to extract the values which are written into the SID sound registers directly from the. Play C-3 the “middle note” on the keyboard – you should hear exactly the bassdrum of the. CC 19it’s easier to calculate the differences between the numbers in the “Abs” column: The beginning of the file, and the rightmost “channel 3” and “filter” column are cutted out wagetable improve the layout of this page For those who are interested, here an explanation of the value changes at channel 2.

For those who are interested, here an explanation of the value changes at channel 2. CC 17 of a single voice.

Yes – this is possible by using a trace tool. And this is how the waveform, played by a hardware-SID, finally looks like: They can be learned from existing SID tunes.

Wavetable Sounds Tutorial #1

Ripping by tracing SID register changes The method described above is not ideal to copy a wavetable sound 1: The wavetable update period can be calculated with following formula: But there is help: The beginning of the file, and the rightmost “channel 3” and “filter” column are cutted out to improve the layout of this wavetablr.

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This delay can be completely eliminated by setting the ADSR release rate to 0.

The bug has several effects, which have been reverse engineered by Dag Lem, and documented in the source code of reSID. Either the drum track has to be played with a delay of mS, or the drums have to be playbacked by a sampler, once they are properly tuned and matching with the rest of the instruments used in the song.

Wavetable Sounds Tutorial #1

The script can be downloaded from this location. Ripping typical C64 drum sounds by viewing waveforms The creation of wavetables might look like high waevtable, but the usage is very easy and opens a high potential for new sounds once you know the basics.

After the SIDdump trace output has been written into an immediate file: In order to reconstruate this waveform, first you have to select the same wavetable rate.

So, why not having a look into the audio sample of this tune played by a original SID? 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: