Siroco Enterprises
From the Audiovisual Identity Database, the motion graphics museum
(1978-1982)
Logo: We see a half-sphere model with lips drawn on it. It has a "doubling-over" motion to give the appearance that it is laughing (this would be the "mascot" of The Comedy Shop). An in-credit "A Siroco Enterprises Production" appears at the bottom left of the screen, with copyright. The name of the company is in a fancy font.
Technique: Stop-motion animation. It's worth noting that this logo uses a clip from the show's intro.
Music/Sounds: A woman laughing.
Availability: This was only seen on The Comedy Shop as far as we know. The logo was retained on reruns shown on the Decades network.