How to implement half speed playback & recording in PNS?

[mcascone]

Hi, I am trying to create an emulation of a hardware looper pedal that, among other things, can record and playback at half speed. In the device’s manual they refer to the sample rate as their way of implementing this, but I don’t think we have that option in the plugin context?

My current thinking of how to do this is to play each sample twice when reading from the buffer. Does that make sense? Is there an existing pattern for this?

Thanks!

[Blue Cat Audio]

The quick & dirty way to do it is to simply repeat each sample twice during playback. This will divide the speed by two!

[mcascone]

nice, that's what i've ended up doing, it works well!

Code: Select all

if(currentlyPlaying)
        {
            if(halfSpeedMode && halfToggle) {
                // flip halftoggle, don't update index
                // This the workaround for not being able to change the sample rate
                // we're just playing the same sample twice
                halfToggle = !halfToggle; 
            }
            else {
                // update index to next sample
                currentPlayingIndex++;
                halfToggle = !halfToggle;
            }
            

[Blue Cat Audio]

Great!