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--- wavetables [2020/10/23 06:29] – created espiegel123
+++ wavetables [2020/10/23 08:20] – [Figuring out the frequency] rs2000
@@ Line 8: / Line 8: @@
 A note about the word **sample**: when discussing wavetables, the word sample refers to the individual numbers in the audio file. When you see a drawing of a waveform,the drawing is really a graph of those sample values over time.
+===== Wavetable Formats =====
+There are a variety of wavetable formats in common use.
+==== Serum ====
+Many apps can use wavetables formatted for use in the Serum wavetable synthesizer. The single cycle waveforms in a Serum-format wavetable are 2048 samples long.
+==== Animoog ====
+The [[animoog|Animoog]] soft synth is actually a wavetable synth although they call their wavetables timbres. Animoog timbres are comprised of 16 single cycle waveforms where each cycle is 1024 samples long. See also [[animoog_timbre|Animoog Timbres]].
+===== Tips and Tricks =====
+==== Figuring out the frequency ====
+Most wavetables use single cycle waveforms that are multiples of 512, 1024 or 2048 samples. At commonly used sample rates (such as 44.1 kHz), there isn't a note (such as A 440Hz or Middle C) whose frequency results in a single cycle waveform of this length. So, if you want to generate waveforms for constructing wavetables, you need to use tools that let you specify a very precise frequency (such as 43.06640625 Hz) or you need to find a way to time stretch waveforms to be of a precise length in samples.
+Another possibility is to use a wave editor to play a looped section, adjust the loop length until the loop sounds smooth (ideally close to but not necessarily exactly 2048 samples long) and re-sample it to a new sampling frequency that will achieve exactly 2048 samples length.
+The AuGEN X iOS app allow you to enter a frequency precise enough to generate samples of the correct length. The frequency depends on the sample rate of your iOS device. The formula is: (Sample Rate)/(Samples Per Cycle). If you are running at 44.1 kHz and need waveform cycles that are 1024 samples long, the frequency would be: 441000 samples per second / 1024 samples per cycle which yields 43.06640625 cycles/sec.
 ===== Tools for Making Manipulating Wavetables =====
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 [[http://scw.sheetsofsound.com/editor.html|Sheets of Sound Single Cycle waveform creator]] - this online editor is a great tool for creating single cycle waveforms that can be used in your wavetables.
-===== Links of Interest =====
+===== Links of Interest =====
+[[https://www.syntorial.com/serum-wavetable-resources/|Syntorial wavetables page]]- links to Serum wavetable tutorials and serum-format wavetable downloads.