TX81Z manual refers to this as 'LFO Speed', however 'frequency' appears to be more adequate term. TX81Z only uses LFO#2 in performance mode. This allows to have two instruments in one performance with independent LFOs. Value for this register depends on LFO waveform used - in case this is Noise/S&H waveform, a simple exponential calculation is Yamaha TX81Z FM Synth W/ Original Manual. Used - Very Good. Price $300 + $40 Shipping. As low as $27/month with. Learn more. List your Yamaha TX81Z Rackmount FM Tone Generator 1987 - 1988 today to get it in front of thousands of eyes, quickly and easily. Learn more on the Seller Hub. Higher bit rate than TX7, multitimbral. TX216/816: multiple TX7's stacked for multitimbrality; there are smaller, cheaper, later FM synths that are multitimbral if that's what you need. TX81Z: DX11 based, 4 operator FM with more complex waveforms. TG33: 4 operator FM which can be blended with straight PCM samples, a weird little box that's more TX81Z Service Manual TX81Z Wiki TX81z patches. TX81Z_Presets.zip (6.6kb) The original TX81Z factory voices, grouped in banks of 32 voices. These voices are designed for the TX81Z (DX11) so, they may not sound as they were designed on previous generations of 4 OP synthesizers. DX27 & DX100 users can load these but only the 1st 24 voices of a Title: TX71ZE Author: endo-yk Subject: TX71ZE Created Date: 12/3/1999 3:25:35 PM