Thanks to both. Advice is very helpful.
I use non-flexible nylon string with speed contoller. I find the speed is 6% faster with the nylon string. For the sound, I find it cleaner with less coloration (or less rubber belt sound), tone is more natural, image is 3-dimensional, bass is better defined and improve tonal balance a lot. Exactly what Sojs commented. The background sounds quieter and darker, probably due to more stable speed and no motor vibration is being transferred through the belt to the platter.
But I get small motor noise comes out from the motor spindle. I don't know why. Is the tension too tight? Can this be resolved? Really apprieciate is Ptmconsulting or Sojs can give advise.
San
I use non-flexible nylon string with speed contoller. I find the speed is 6% faster with the nylon string. For the sound, I find it cleaner with less coloration (or less rubber belt sound), tone is more natural, image is 3-dimensional, bass is better defined and improve tonal balance a lot. Exactly what Sojs commented. The background sounds quieter and darker, probably due to more stable speed and no motor vibration is being transferred through the belt to the platter.
But I get small motor noise comes out from the motor spindle. I don't know why. Is the tension too tight? Can this be resolved? Really apprieciate is Ptmconsulting or Sojs can give advise.
San