I am in the process of converting old reel-to-reel and cassette tape recordings to digital. One reel-to-recording from the early 70’s of my first band is real weak. When I amplify the sound the tape rumble is also amplified. I’ve tried EQing out the lows & highs and compressing. But, the rumble is still overwhelming and must be sharing the mid range of the vocals. A faint guitar is present and maybe a bass but I can’t hear it. I do not remember what recorder was used for the original mono recording but I am playing it back on Akai GX-747 without Dolby NR and sending it to Sonar 7 thru a Sonar V-Studio 100. I have not tried cleaning it up in Sonar 7 yet because I am still trying to improve the input signal first. What would you do to rescue this important memory?