Line Inputs

Equalisation and metering for disco and stage.

The Microphone Input stage

A high quality DI box circuit

An easy-to-follow project to fit separate outputs to your Dr. Rhythm to increase its versatility.

Single, dual or delayed beats

Twice the gain

A versatile modular low frequency oscillator project, with complete kits available from Digisound.

Build this noise reduction project

The third instalment of our series describing the design and construction of a high quality modular effects rack system.

Reader Marek Bokowietz has constructed a complete electronic drum kit from E&MM's own percussion modules, the Syntom, Synbal and Synclap.

Can't afford your own MIDI Thru box? Steve Hartwell's simple circuit does the same job, and costs under a tenner.

Yes, we know they're easy to get, but it's also a piece of cake to get rid of 'em — if you know how, that is...

Here's the first of our special effects boxes.

The final part of E&MM's advanced microprocessor design

Modifications and additions in this final part of our advanced micro controlled drum machine

Percussion Generator Update

Additions to the Sound Generator PCB that make it even more versatile.

Part 3 of the Electric Drummer — also works with your microcomputer

Powering Capacitor Microphones

Transistor Power Amplifier Surgery

Resonant Filters

State Variable Filter

Non-Concordant Tone Generation

A fascinating area of synthesis with practical circuits to start you off.

Tuning Up — A Review of VCO Calibration Methods

Tuning and Calibration, Part 2