ringtones phone Though it seems rather simple, it's really quite a deep tone generator capable of making a lot of very interesting sounds. Besides that, working with limits like 13mm speakers and low polyphony tends to make you think outside the box and come up with solutions beyond what you normally would think of in a more expanded studio situation. JI: How do you use the PCM channel in your ringtones?. Ouimette: I look at the PCM channel as a good place to really expand on the sound of a ringtone. There is only a limited space to work with, but you can still add a lot of character with ADPCM. Also, since the default drums are FM-based, I like to supplement them with drum loops or individual samples to thicken the sound. Our phone also has a stereo earbud set in addition to the ringtone speaker, so the difference is really heard when the user listens through them.