The TR-606 has six synthesized sounds: Bass Drum, Snare Drum, Hi Tom, Lo Tom, Cymbal and Open/Closed Hi Hat.

An additional function labeled accent serves to modify the volume of the entire drum mix on a given beat.
This allows, for example, a louder beat 4 in a simple drum pattern: boom-chik, boom CHIK.
There is no "swing" parameter on the TR-606.
The output is mono.

The Lo Tom and Hi Tom tracks have outputs to trigger an external sound source.

When the closed and open hihat are played together, a 3rd hihat sound emerges.

When the trigger output is in use, the corresponding internal sound still functions normally.
The tom track could be employed, for example, to trigger a kick drum synth module as the Scientific Americans did.
The TR-606 has six synthesized sounds: Bass Drum, Snare Drum, Hi Tom, Lo Tom, Cymbal and Open/Closed Hi Hat. 
An additional function labeled accent serves to modify the volume of the entire drum mix on a given beat. This allows, for example, a louder beat 4 in a simple drum pattern: boom-chik, boom CHIK. There is no "swing" parameter on the TR-606. The output is mono.
The Lo Tom and Hi Tom tracks have outputs to trigger an external sound source. 
When the closed and open hihat are played together, a 3rd hihat sound emerges.
When the trigger output is in use, the corresponding internal sound still functions normally. The tom track could be employed, for example, to trigger a kick drum synth module as the Scientific Americans did.
Roland TR-606