Midi Problem With Sustain Pedal, Pedal Plays Note Options

[brunomb]

I am using a MIDI to USB adapter to connect a Yamaha P-155 Keyboard to a Macbook laptop. The adapter works in Garageband and Synthesia. The sustain pedal on the keyboard is not working properly with this setup. Instead of sustaining the notes, when I depress the pedal it plays a note by itself and mixes up different sounds. I don't have experience with MIDI so am clueless as to what is happening. Any help is appreciated. Thank you.

EQUIPMENT

• Yamaha P-155 Keyboard
• Apple Macbook dual 2.4 Ghz 2010 model
• Unbranded USB to MIDI adapter (http://www.amazon.co.uk/gp/product/B004IJ5FEU/ref=oh_details_o00_s00_i00)

SOFTWARE

• Garageband 2011
• Synthesia
• MAC OS X Lion 10.7.4

[houstonmusic]

interesting.
question: the notes and mixed up sounds are coming from GB or Synthesia? that is, they're from the laptop rather than the p-155? i'd guess that's what you mean.
the p-155 is a full sized piano, designed for home use, as i recall. it may have a sustain pedal set up that's more complicated than the usual controller 64 on-off format, that is, it may transmit half pedal data, or something proprietary. check your midi implementation chart in the yamaha manual.
also, cx to make sure you've got the sustain pedal plugged into the correct pedal input on the back of the p-155. there may be several, and they would be sending different data types.
good luck with this one.

I am using a MIDI to USB adapter to connect a Yamaha P-155 Keyboard to a Macbook laptop. The adapter works in Garageband and Synthesia. The sustain pedal on the keyboard is not working properly with this setup. Instead of sustaining the notes, when I depress the pedal it plays a note by itself and mixes up different sounds. I don't have experience with MIDI so am clueless as to what is happening. Any help is appreciated. Thank you.

EQUIPMENT

• Yamaha P-155 Keyboard
• Apple Macbook dual 2.4 Ghz 2010 model
• Unbranded USB to MIDI adapter (http://www.amazon.co.uk/gp/product/B004IJ5FEU/ref=oh_details_o00_s00_i00)

SOFTWARE

• Garageband 2011
• Synthesia
• MAC OS X Lion 10.7.4

also, it just occurred to me that crappy midi to usb cables can really mess up the data stream. a client had bought a $6 one on amazon to use from his clavinet to GB, and it did something very similar. i had him switch it out with the M-Audio Uno, something like $35, and everything was flawless.