How to resample a single cycle waveform

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In this tutorial, we're going to create a complex, phase modulated (similar to FM) waveform, take a sample of this by resampling the ER-301, and set it up to be played back with pitch control. The process for sampling a single cycle waveform from an external piece of gear or module is very similar, so we'll point out the differences as we go.

External Connections

You will need to make two cable connections to get started. We'll use channel 1 for this:

  1. Patch OUT1 to your mixer or sound card.
  2. Patch your incoming V/Oct to A1

For more information about which inputs are appropriate for various signal types, see Front Panel Inputs.

Creating the complex waveform sample

In this first section, we will create the complex, phase modulated waveform that we want to sample. We will modulate the phase of one sine wave oscillator with another that is tuned to an even multiple of the carrier sine wave's frequency. If you wanted to sample an external module, you could skip these steps and proceed to the next section. But it may be easier to follow this re-sample tutorial all the way through your first time.

Sampling the Waveform

In the preceeding section, we created a complex, phase modulated signal to sample. If you wanted to sample a single cycle waveform generated by some other external module, you could set the input for this chain to be one of the audio inputs (INx), and continue with the steps below to sample the waveform.

Prepare the Sample for Playback

Congratulations! You've created a complex waveform, sampled it, and saved it to your SD card! Now let's do something useful with this sample. Let's set it up so that it plays back perfectly with no glitching, and set it up so that it's pitch can be controlled by an external V/Oct input.

Your keyboard, sequencer, or other V/Oct source should now be controlling the pitch of this sampled, complex waveform. And it should sound perfect. Happy sampling!