Operation Manual

AUDIO BASICS
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See “About latency” for more information about buffer size and latency.
CPU Usage Limit settings
In the “Miscellaneous” section on the “General” page in Preferences, you can define an upper limit for the CPU us-
age. If the DSP Load should exceed this set limit, the Reason application will stop receiving and outputting sound. If
this happens, you might have to change the audio settings (see “Sample Rate settings for recording and playback”
and “Buffer Size settings”) - or remove tracks and/or devices from your song. By default, the “CPU Usage Limit” is set
to 80%. This is where the CPU load usually starts to make the sound crackle and distort.
About MultiCore Audio Rendering
Reason fully supports multicore audio rendering. This means that if your computer has multiple CPU Cores (Dual
Core or Quad Core, for example), or multiple CPUs, Reason takes advantage of this to significantly enhance the per-
formance. A higher system performance allows for more tracks and devices in your songs.
If your computer has a multi-core CPU, or multiple CPUs, MultiCore Audio Rendering is active by default, as indicated
on the “General” page in Preferences:
Master Tune setting
By default, Reason plays back a “middle A” at 440 Hz, which is the standard tuning in most instruments. However, if
you are playing Reason together with other instruments, you may want to adjust the tuning:
1. Select “Preferences...” from the Edit menu (Win) or Reason menu (Mac).
2. Select the “Audio” page from the drop-down menu.
3. Adjust the global tuning with the Master Tune slider or button controls.
D If you like, you can also adjust the Master Tune during playback.
! The Master Tune setting affects the tuning of all sound sources in Reason. It also affects the tuning of the Re-
drum and Dr.Rex loop player.