Owner's manual

User Interface

Rate (kHz)

Bitspeek performs its calculations at a designated fixed sample-rate, regardless of

the sample-rate your project is running at. The possible settings are 8 kHz, 11 kHz,

22 kHz and 44 -> 48 kHz (the last mode will actually adjust to the project sample-

rate and select a rate between 44 and 48 kHz). Notice that Bitspeek is still compati-

ble with any host sample-rate by performing automatic sample-rate conversion. The

Rate choice affects several other internal parameters in the DSP algorithms and

changing Rate will change the sound dramatically. (Notice that the 44 kHz mode

may require a lot of CPU. In many cases, the 22 kHz mode works just as well.)

Frame Rate

The audio signal is analyzed and processed in blocks called "frames". For each

frame, Bitspeek estimates the pitch, volume and formants of the incoming audio, as

well as the balance between "voiced" audio (e.g vowels) and "voiceless" (e.g., the

noise in a consonant). By lowering the frame rate, the analysis will be performed

more rarely and you will achieve a cheaper toy-like sound. You can also "freeze" the

audio by dragging Frame Rate all the way down to 0. The parameter range is 0 to

80 Hz (if Sync is off) and higher rates requires more CPU than lower rates.

Sync

Enable Sync to make Bitspeek "freeze" frames in sync with the tempo of your mu-

sic. When Sync is enabled, you may select various time synchronized rates (1/8, 1/

16 etc) with the Frame Rate slider instead of selecting a rate in Hz.

Figure 1 Bitspeek Interface