Why do electronic keyboards make false notes?
February 19th, 2010My 3-year old Yamaha keyboard started sounding ‘false’. Is this common? Are there any mechanical actions involved in an electronic keyboard (I thought each pitch was recorded)? Anything I can do to restore quality? This keyboard is touch-sensivitive and costs $400 new…. Help? Thanks!
BTW, $400 is a cheap keyboard, so my guess is that for each note, you have a circuit which consists of a pulse generator that uses a resistor and capacitor to set up the time-constant associated with the frequency you desire. If the note sounds like it is straying away from its "true" sound, then your capacitor is probably failing and straying away from its rated value. I would open the keyboard, look for a bank of capacitors aligned in a linear fashion. Try to read the values of the capacitors and replace with a reliable alternative.
February 19th, 2010 at 2:11 pm
there should be a way to put it back in "tune". usally they are pluged in to a computer to program them. check with the local music shop and see if they perform this.
References :
February 19th, 2010 at 2:46 pm
Is everything else work perfectly?
Pitch bend and mod wheel still work properly? (how does your pitch bend work. Does it stuck?. How about mod wheel. Where do you position it?)
Are your power supply ok? (try measuring powersupply or replace with the right one).
Any drop or things that could damage your speakers? (try using headphone).
These are something you might be able to check.
References :
February 19th, 2010 at 3:29 pm
BTW, $400 is a cheap keyboard, so my guess is that for each note, you have a circuit which consists of a pulse generator that uses a resistor and capacitor to set up the time-constant associated with the frequency you desire. If the note sounds like it is straying away from its "true" sound, then your capacitor is probably failing and straying away from its rated value. I would open the keyboard, look for a bank of capacitors aligned in a linear fashion. Try to read the values of the capacitors and replace with a reliable alternative.
References :