Rhythmic Placing

Listening to the snare drum in the quieter bits in this recording (e.g. around 20 sec. in):

This is not sloppy playing, but a deliberate, and fascinating, offset. We all too often forget these kind of nuances - things that happen in-between the beats and that are difficult to capture and analyse.

Percussion instruments

Here are some examples of (mostly) unpitched percussion instruments. And here is a list of some of the more common used unpitched percussions.

Simple Metric Modulation

A drum tutorial explaining metric modulation (with notated illustrations as a bonus):

Ravel - Repetition

Ravel's famous Bolero (Vienna Philharmonic Orchestra)

From a drummer's perspective

Here is drummer Gavin Harrison talking about working with less common time signatures (7/4 in this case):

Percussion Music

• Luigi Nono's composition for percussion and live electronics:
• Edgar Varese Ionisation. And an article about the piece: Jean-François Charles - Organization of Scattered Timbral Qualities: A Look at Edgard Varèse's Ionisation.
• Graham Fitkin Hook.

Percussion instruments

A guide to many percussion instruments from The Orchestra: a user's manual project. 

Xenakis percussion music

Rebonds A:

Rebonds A from Alpine Chocolate on Vimeo.

Some background about Xenakis and his work.

Live electronics

Some examples of music for solo instrument with electronic processing:

• Music for hihat and computer Cort Lippe
• The Twittering Machine Andrew May
• Sequitur XIV Karlheinz Essl (and other interesting pieces). 

Drum notation

A guide to drum notation from MIT.