David Mellor tries out three new effects units from ADA — a MIDI programmable stereo equaliser, MIDI valve preamp, and a pitch transposer - and finds one that gives his secret studio weapon a run for its money.

This latest release in the popular Micro Rack range of budget signal processors is put through its paces by Mark Jenkins.

Studio Test

Jim Betteridge finds himself in harmony with the latest addition to the Microrack range

Chris Davis, Our Sax Maniac Reports

Intelligent Pitch Shifter

Most pitch shifters wouldn't know their A minor from their E major, but DigiTech's IPS33 knows a thing or two about playing in key. Simon Trask finds himself in harmony with the Intelligent Pitch Shifter.

Smarter than the average pitch shifter?

David Mellor assesses the musical intelligence of the DigiTech IPS33 SmartShift intelligent pitch shifter.

Intelligent Harmoniser

With four independent harmonies and its 'intelligent harmonising', Digitech's VHM5 pitch shifter promises much. Rowland Jones puts it to the test.

Ingenious harmony processor

Your Plastic Pal Who's Fun To Sing With

You can produce vocal pyrotechnics little short of magic with this rackmount version of the acclaimed VHM5 Vocalist. Our reviewer sings its praises.

Vocal Harmony Processor

It's that Nicholas Rowland again, testing his tonsils on Digitech's new 5-part vocal harmony processor. You too can sound like The, er, Five Tops

Voice Processor

More than just a vocoder, this voice processor incorporates pitch shifting and pitch-to-MIDI conversion. Bob O'Donnell listens to what it has to say for itself.

Boss RPS10 Pitch Shifter

They said it couldn't be done... a 'harmonising device' for under £200.