Glaresoft (formerly Bitshift Audio) today introduced iDrum, a third-party plug-in software instrument designed for Apple’s GarageBand music software. iDrum adds a powerful drum machine to GarageBand’s music production studio, along with nearly 200 iDrum files — Glaresoft’s innovative new drum loop file format — and over 500 individual drum sounds ranging from classic beatbox bloops and bleeps to high quality ethnic percussion. iDrum requires Mac OS X 10.2.6 or later and is priced at US$49.95.