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64V WAVETABLE DRIVER

April 19, 2019

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. I will create a separate webpage once the firmware is final. 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. In order to reconstruate this waveform, first you have to select the same wavetable rate. This delay can be completely eliminated by setting the ADSR release rate to 0. The gate is delayed by up to ca.

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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. 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.

CC 17 of a single voice. 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.

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. The wavetable update period can be calculated with following formula: Wouldn’t it be better to extract the values which are written into the SID sound registers directly from the.

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In the first row you can see: This makes it difficult to locate the waveform and to differ it from the audio sum. Yes, the triangle waveform is not visible!

Wavetable Sounds Tutorial #1

The method described above is not ideal to copy a wavetable sound 1: The script can be downloaded from this location. 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.

They can be learned from existing SID tunes. Try following sequence you can either use the JSynthLib editor, or edit this sequence directly from the SID control surface: CC 33 and the transpose value OSC1 transpose: I will create a separate webpage once the firmware is final. Here finally a view on the emulated bass drum, which starts at 0: Play some notes on the keyboard to try out the sound.

This is also the explanation, why most preset sounds of the “common” Wavvetable 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.

Wavetable Sounds Tutorial #1

Three tracks of up to 32 steps are available, which wavetale control 3 different CCs. For common wavetable sounds, it’s enough to control the waveform OSC1 waveform: After the SIDdump trace output has been written into an immediate file: Well, it’s difficult to extract the bass drum itself, since other sounds are played at the same time. In order to get a period of 20 mS, the appr.

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

There is only one 3-track wavetable per patch, and switching between patches takes some time, which is not wanted when playing a sequence of different drum sounds. If you feel confused, just go further to the next chapter, where a simplified method is described.

CC 19it’s easier to calculate the differences between the numbers in the “Abs” column: Ripping by tracing SID register changes The method described above is not ideal to copy a wavetable sound 1: So, why not having a look into the audio sample of this tune played wavetabls a original SID? Play C-3 the “middle note” on the keyboard – you should hear exactly the bassdrum of the.

And this is how the waveform, played by a hardware-SID, finally looks like: The bug has several effects, which have been reverse engineered by Dag Lem, and documented in the source code of reSID. The gate is delayed by up to ca. For those who 644v interested, here an explanation of the value changes at channel 2.