How to connect Yamaha per 630 keyboard tot PC connection to Yamaha per 630 keyboard PC

just use the USB connection from the keyboard to connect it to the computer. MIDI will work over USB just fine.

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I haven't been able to find documentation to be sure if the CT-630 has MIDI ports on it (my guess is no, but please check). If it does, you can get something like the Yamaha UX16 USB MIDI Interface cable to connect the keyboard to a PC.
If not, sorry, it seems the only thing you could do is record the audio output.

I have a PSR-E323 and to connect it with my pc using a MIDI connector should i install driver from http://download.yamaha.com/usb_midi/ ??? I tried to install that.. An error msg popped up... error 25001 no device is connected. connect a device and try again. If the "found new hardware" wizard appears push the cancel button...What should I do?? Help me pls...

Assuming you have a MIDI interface on your computer, you need to connect the MIDI cables between the keyboard and the PC. You cross connect, that is, in to out and vice versa. You will ALSO need the driver software for the interface in the PC AND most importantly, some software in the PC to handle the MIDI for instance to record.

The connector or the soldering to the circuit board has failed. Replace or resolder the connector.

The key contacts have gotten dirty. The contacts are CONDUCTIVE rubber pills that are pressed onto circuit traces on the circuit board under the keys. Onehas to dis-assemble the keyboard very carefully noting the size and location of all the screws and using great care of the cables that connect the top and bottom of the case.
when you remove the keys, you will find silicone rubber strips with the black pills underneath, two pills per key.
Clean these with ONLY 99% isoprophyl alcohol and Qtips as well as cleaning the circuit board traces they contact.
Carefully re-assemble the keyboard.

You can obtain these from Yamaha Music Spares Dept in your country.

Go to the following Yamaha site link and choose your country

http://www.yamaha.com/

Select Musical Instruments - Support and the contact details will be displayed.

I just used them to by some parts for a Clavinova and they were in stock, accepted credit cards and delivered within 24 hours.

Depending on what you want to do...

If it's only music Mixing, you will have to plug your keyboard via audio jack to the line in of your computer. Then Audacity (free soft) can do the job.

If you want to edit midi file with your keybord you will need midi editor software like Linux-Rosegarden or if under windows try LMMS (all free soft of course).

Good luck

no sound on all the g and gflats except the highest octave