The Yamaha AN1x Synthesizer mailing list

fm=frequency modulation With simple fm you get a vibrato. Set the 
sync/fm to just fm turn the fm amount just a little-maybe 2 or 3. For 
a normal sounding vibrato use LFO 1 as the source and use a sine 
wave. For something a little more spacey, set the LFO Delay to about 
20 and play a sustained patch. Then set the LFO to s/h. This will 
give you a normal sound that then drifts out of tune in an odd and 
musical fashion.The more you turn up the fm depth, the weirder the 
sound gets. Eventually the sound gets totally trashed. FM depth is a 
great control for free eg. Also, the faster the LFO the wilder the 
sound.

Now when you use osc sync one oscillator controls another for a vocal-
like timbre. You can apply the vibrato to both the master and the 
slave, just the slave, or just the master. I usually set the fm to 
control the slave. This brings in some nice evolving overtones 
without trashing the central pitch.

Turning the Frequency modulation source knob while playing will 
change the sound radically.

There's two frequency modulation sources. One affects the frquency 
modulation. The affects the first modulation source. A nice use for 
this is to have an envelope for your LFO.

Be careful when you use the modulation matrix so you can have knobs 
or ribbon controllers affect the fm. Sometimes the fm winds up 
getting stuck at a really setting. Then you need to just turn it back 
down to where you had it in the first place.

Rainbow Jimmy
http://www.spaceanimals.com
http://www.mp3.com/spaceanimals

I get stuck on this periodically. My apologies. I can use VCO 2 to modulate the frequency of VCO 1 for 2 op fm synthesis. Normally with fm synthesis there is a carrier and a modulator and the volume of the modulator will change the tone.

So is the fm amount knob more for vibrato, and the fm source 2 more for fm synthesis?

Thanks

I'm home. I turned on the AN1x. Here's what I found out:

With the synth set at fm only.

1. I can use VCO 2 to modulate the frequency of VCO 1 for 2 op fm synthesis.

Yes. The manual says this is not two op fm but it is.

2. Normally with fm synthesis there is a carrier and a modulator and the volume of the modulator will change the tone.

Changing the volume of the modulator will change the tone, but it's subtle.

3. So is the fm amount knob more for vibrato, and the fm source 2 more for fm synthesis?