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5 PRESETS
The CPU of the FM9 is used mainly for sound processing. A preset with nothing but an Amp and Cab is less
demanding than a preset with a Wah, Drive, Amp, Cab, Delay and Reverb.
You can check the current CPU level at any time by viewing the mini CPU meter at the top of the layout grid.
The maximum recommended load is approximately 80%. There are safeguards to prevent you from pushing the
FM9 too far. Should CPU levels rise above the allowable limit, the FM9 will disable sound processing and flash the
warning, “CPU LIMIT - Muted”. This allows you to remove blocks or change settings to solve the problem.
The FM9 will also prevent you from inserting a block that would push the CPU over the limit. If this happens,
you can make changes to reduce the current CPU load and try again. You might remove an effect that is less
important. Adjusting certain parameters can also help.
Different blocks have a different impact on the CPU. Some blocks such as Amp, Delay, and Reverb have hardly any
effect on the meter at all because they run on dedicated CPU cores.
Blocks basically use the same amount of CPU whether they are engaged or bypassed, but remember that the
meter shows the CPU level for the current scene. Switching to a scene that uses a more CPU-intensive channel
can increase the CPU load. Check various combinations of channels and scenes to avoid unwanted CPU
overloads.
Here are a few of the common block parameters whose settings have a notable effect on CPU usage:
Amp: Output Comp: Set to "0" for the least CPU usage.
Cab: Mute: Using two IRs demands more CPU than using one.
Set the mic Preamp Type to NONE and set Room Level to 0%.
Reverb: Quality and Echo Density. Lower = less CPU.
Compressor: Set Type to one of the "PEDAL" options to use less CPU.
Phaser: Stages. Lower = less CPU.
Filter: Order and Q. Lower = less CPU.
Multitap Delay: Type. Different types have different CPU requirements.
Plex Delay: Number of Delays affects CPU usage.
Synth: Turn extra voice type parameters OFF to conserve CPU
Modiers also affect CPU usage.
TIP: The Fractal Audio Wiki keeps a list of CPU saving ideas.
CPU & USB
On the FM9, CPU usage does not increase when USB is connected/disconnected.
PRESET CPU LIMITS
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