Wikipedia defines an audio transient as "a high amplitude, short-duration sound at the beginning of a waveform that occurs in phenomena such as musical sounds, noises or speech". Here's an example that points out the transients in a short snippet of audio:

So, a transient is just a peak that occur…

In a post a few weeks ago I showed how I had been using an I/O expander chip with the Texas Instruments Tiva LaunchPad to provide eight additional inputs using a single serial connection. I've managed to increase this to 32 inputs.

I did this by using dual MCP23S17 I/O expander chips as shown in t…

I've been spending a good amount of time working on a phase vocoder lately. I'm happy to say I have an early working demo version that sounds quite good.

The phase vocoder allows for stretching and compressing the time duration of audio (as shown in the waveforms above) without changing the pitch…

Lately I've been working with using I/O expanders in conjunction with my Texas Instruments Tiva LaunchPad. The Tiva LaunchPad has a limited number of I/O pins and I'm trying to increase the number by using I/O expander chips.

I came across this YouTube video which shows how to use an MCP23S08 I/O …

I've figured out how to interface my Tiva LaunchPad with a better quality DAC (digital to analog converter). Video example:

Earlier, I'd been using a simple 8 bit DAC made from a handful of 22K resistors that sounded, well, less than optimal. I'm now using a 16 bit integrated circuit DAC…