Do You Have The Same Problem With 6th String? in James Tyler Variax Guitars / Workbench HD Posted September 2, 2015 I will try to summarize the information about my guitar. Hopefully it will be at least somewhat comprehensible. 1) The strings E6 and A5 produce a parasitic frequencies. String E6 - approximately 1.7kHz, string A5 - approximately 1.9kHz (in addition there are harmonic frequencies). Frequencies were determined by measuring of the direct signal from the piezo (electronics disconnected), audible they are also at unconnected guitar (unplugged). On the string A5 is audible also through magnetic pickup. 2) While using the modeling - the problem is only with the string E6. 3) The piezo sensor E6 was replaced - no improvement. 4) The complete bridge was replaced - no improvement. 5) I swap the wires from the E6 and A5 piezos into the circuit board. - The string E6 is OK - The problem is now on the string A5 6) The electronics was replaced - no improvement. Options to solve the problem: - adjustment of the firmware - weaken the parasitic frequency on strings E6 (on the string A5 this works good) or - find a reliable way to reduce mechanical cause (at least for strings E6) The most difficult task: convince Line6.