DigiTech DHP-33 (circa 1994)
Surviving documentation on the DigiTech DHP-33 is thin - essentially one launch advertisement and a trade-press preview. Together they cover the basics. A preview in Mix Magazine (March 1994, p.118) called the DHP-33 a pitch shifter introduced to replace the discontinued IPS-33B Intelligent Pitch Shifter. It named the unit a smaller sibling to the flagship DHP-55 and noted a retail price under $1,000.
The feature set comes mainly from DigiTech's own advertising in EQ Magazine (March 1994, p.31). The ad argued the DHP-33 outclassed every competing pitch-shifter at its price point. Its spec breakdown listed chromatic, scalic, and chordal harmony modes, three-part harmony processing, delay up to 1.5 seconds, pitch correction, and a 20 Hz-20 kHz frequency range.
Beyond those two period references, almost nothing else has surfaced. There is no service literature, no later reviews, and no collector documentation in the usual archives. Known specifications:
- Intelligent pitch shifter / harmony processor
- Replaced the IPS-33B; positioned below the DHP-55
- Harmony modes: chromatic, scalic, chordal; three-part harmony
- Delay up to 1.5 sec; pitch correction
- Frequency response: 20 Hz–20 kHz (as stated in period advertising)
- Original retail: under $1,000
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