I have a Tascam 388 and have just recently bought an MRL 21T204 calibration tape. I' hopig to check the bias and set the operating level (both record and reproduce levels). I need help from some of you who've been though this before. It would be great if you could walk me through the process. I also have a Heathkit model IG-18 signal generator at my disposal. It will generate frequencies up to around 100,000Hz. I have a manual as well. I need help determining which inputs will allow me to calibrate which level, and what I will calibrate using the MRL tape (I'm assuming the playback level?). Thanks in advance for any info you can impart.