Hi Scream – new overdrive pedal released

I’m thrilled to announce our first pedal is finally available for sale, and we called it Hi Scream™. Inspired by the legendary TS-9 Tubescreamer overdrive – originals of which are now selling for crazy prices, if you can find one at all! Re-inventing lost or rare vintage tech – with a modern twist – is…

Fixing a buzzing or popping noisy pedal

I recently bought an old and (ab)used tube screamer that was making annoying buzzing, crackling and popping noises when turned on, and I thought the fix(es), as well as my debugging approach might be useful to other owners… First, yes I know pedals like these high gain overdrives are inclined to pick up mains hum,…

Reverse polarity protection for guitar pedals

A design series on embedded electronics and audio design. Applying power to pedals should be a simple thing, but as designers we have to understand that if something can go wrong, it absolutely will. Or said another way, if a user can do something stupid, they will… So I thought I’d dig in on what…

Audio circuit test probe build

An audio circuit test probe is a really simple, but useful tool when testing and debugging audio circuits. The one I’m presenting here is a little over the top(!) – you can build an equivalent much simpler and cheaper – but this one’s for me, and I like making things! Fundamentally, what I ‘m building…

Development board test box for guitar pedals

I built these development board / test boxes to give me a robust and practical way to prototype my guitar effects pedals. They are pretty solid and can easily move from work bench to the floor for testing – especially with the onboard battery. The PCB ensures a solid connection to route power and audio…