bass knives to the treble

13:46 Oct 7, 2016 

Charging from the bass knives to the treble
atacando como cuchillos dese los graves a los agudos

13:05 Oct 7, 2016 

"from... to" might be referring to the "call and response" style described here:
"The Motown Sound is a style of soul music with distinctive characteristics, including the use of tambourine along with drums, bass instrumentation, a distinctive melodical and chord structure, and a "call and response" singing style originating in gospel music."
randb.about.com/od/faqs/f/MotownSound.htm
Particularly if you bear in mind the group's lead singer was a baritone:
"They were notable for having Stubbs, a baritone, as their lead singer, whereas most male/mixed vocal groups of the time were fronted by a tenor."
https://en.wikipedia.org/wiki/Four_Tops

12:33 Oct 7, 2016 

Hola otra vez: Lo he consultado con alguien que controla bastante y me dice: "He is talking about the Four Tops. He is saying they used knife-like bass sounds (short and punchy) and lots of treble. This is typical of the Motown sound.".