From Wondering Sound:
Dolphy’s improvisations have a hectic, can’t-hold-me-back quality that makes Ornette Coleman sound sedate by comparison. Dolphy’s lines make acrobatic leaps over intervals too wide to sound singable, but there was always a voicelike yawp to his tone. On bass clarinet — an instrument he had all to himself as a soloist — his sound is as raw and woody as a broken branch. It bursts with abrasive and changeable overtones. Much the same is true of his alto saxophone playing. And it wasn’t just the music — it was how the rhythm section manhandled it.