![]() “Frank also used the active filters to emphasize the highs in the 4k-to-8k range in order to bring out the nuances of the strings. He could basically tune his guitar to the room, determine how the room responded to the amplifier, and then use the Q control to elicit the feedback he wanted. "The filters also featured a variable resonant frequency knob that allowed Frank to control the feedback characteristics of his rig in any hall. “One trimpot is dedicated to bass frequencies from about 50Hz to 2kHz, and the other one affects the top-end frequencies from about 500Hz up to 20kHz. “The trimpots are identical parametric filter circuits,” Zappa’s tech, Midget Sloatman, told GP in 1995. Now, 40 years later, the Frank Zappa estate has released a curious item: Roxy by Proxy, a CD with a little more than an hour of unreleased material from these shows. He could basically tune his guitar to the room, determine how the room responded to the amplifier Midget Sloatman Published By Frank Zappa Music Manufactured By Warner Bros. Most of the songs were recorded on December 8, 9 at The Roxy Theatre in Hollywood, California. ![]() ![]() ![]() Used on Frank’s last tour, in 1988, this custom-made Performance solidbody sports concentric knobs along with tiny screwdriver-adjustable trimpots to accommodate the tone tweaking Zappa was so fond of. Roxy & Elsewhere is a double live album by Frank Zappa and The Mothers, released on September 10, 1974. ![]()
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