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Bc2000 (for the BCF2000 & BCR2000)

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Re: B-Control Nano BCN 44 Latency Issues

2012-11-15 by electron8000

Hello again,

I just tried out your tool, the MidiTools 1.3.0 and did a test series. First thing i saw under the view "input messages" is that actually the keyboard sends $FE and $F8 active sensing signals in idle state. I put the keyboard in "Multi Mode" and "RC Mode" for the test. In addition i tested with pressing and releasing a key at a high and at a low frequency. The test results are as follows:

************************************************
SETUP1 - keyboard midi-out -> soundcard midi-in:
************************************************ 

-Multi Mode:

--no key pressed:
---> $FE signals only, 4 per sec.
--keypressed/keyreleased:
---> $FE signals correctly interleaved with keypressed/keyreleased signals

-RC Mode:

--no key pressed:
---> 1x $FE, 7x $F8, 1x $FE, 6 x $F8 signals then loop, 32 signals in total per sec.
--keypressed/keyreleased:
---> $FE and $F8 signals correctly interleaved with keypressed/keyreleased signals

**********************************************
SETUP 2 - BCN44 midi-out -> soundcard midi-in:
**********************************************

->no active sensing signals at all, only knob turning messages (pitch/mod).

***************************************************************
SETUP 3 - keyboard midi-out -> BCN44 midi in, BCN44 midi out -> soundcard midi-in:
***************************************************************

-Multi Mode:

--no key pressed:
---> same as in setup 1
--keypressed/keyreleased with a high frequency:
---> only keypressed and keyreleased signals, no active sensing signals at all
--keypressed/keyreleased with a low frequency:
---> no signals received at all for some time, then a bunch of keypressed and keyreleased signals in one rush followed by active sensing signals

-RC Mode:

--no key pressed:
---> same as in setup 1 
--keypressed/keyreleased with a high frequency:
---> only active sensing signals, no keypressed or keyreleased signals at all
--keypressed/keyreleased with a low frequency:
---> active sensing signals correctly interleaved with keypressed and keyreleased signals


So this was it what i observed so far. The LED of the soundcard always flashes at the same frequency of the signals received. Seems as if the BCN44 has buffering problems? Maybe its overloaded and i need to put it into a different state. By the way: is there any way to reset the entire thing to default state? From reading the (somewhat confusing) manual i couldn't find out : /.

Thanks,
electron8000

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