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Summary of Contents for iSP Technologies THETA PRO DSP
- Page 2 Guitar DSP based processor; all controlled on the floor, with simplicity of use and programmability. The THETA PRO DSP™ is based on state of the art Digital and Analog circuit design and technology and features ISP Technologies proprietary algorithms for all THETA PRO DSP™...
- Page 3 Quick Start Refer to the Figures shown for the hardware drawings which show the locations of the switches, knobs, and jacks when reading the following, or even better, just look at your unit. 1. Connect the guitar to the IN jack, connect the STAGE OUT jack(s) to a power amp such as the ISP Stealth which is connected to a guitar speaker cabinet, OR connect the DIRECT OUT jacks to the input of a mixer, OR connect the PHONES jack to headphones or earbuds (or connect all three).
- Page 4 2 switch, followed by the STORE switch. Note that the THETA PRO DSP ships with the Preset 1-100 and Preset 101-200 LOCK set to ON, so storing to those presets will display a FAIL message. Storing to presets 201-224 is always allowed.
- Page 5 DETAILED OPERATION: Refer to Figures above for the hardware drawings which show the locations of the switches, knobs, and jacks when reading the following. Refer to Figure 2 for the signal flow diagram which shows the flow of the signal through the unit from the input to the outputs.
- Page 6 Functions and Parameters: Note that the titles of the functions do not always appear on the display, but most of them are contained within the first parameter of that function. The following list of functions are accessed in order by turning the FUNCTION knob clockwise. The parameters are then accessed by turning the PARAM knob.
- Page 7 3. GAIN (1 to 90 dB): Dials up the gain before the clipper stage. Additionally, there is gain available in the Pre EQ and THETA type distortion, so that the total amount of gain applied to the signal can exceed 120 dB! As a point of reference, a typical amp head has a gain of about 60 dB with the knobs set to maximum.
- Page 8 (BW). The graph below shows an EQ response curve with a center frequency of 100Hz and also at 1KHz. The MID “LEVEL” on the THETA PRO DSP will adjust the amount of Boost or Cut applied to The MID FREQUENCY, “FREQ” adjusts the center the signal.
- Page 9 Frequencies below this point will still be boosted or cut, just not as much, and as the frequency in the signal decreases, the amount will diminish to 0. This is a ‘shelf EQ’ type section that remains nominally flat at high frequencies. C) POST EQ Function 1.
- Page 10 13. THRESHOLD (-90 dB to –20 dB): The approximate signal level at which the DECIMATOR will begin downward expansion of the input signal, effectively turning off the noise. Higher threshold values are needed to deal with higher levels of noise. Since the detector for the DECIMATOR is at the very input of the digital signal processing chain, this threshold does not usually have to be re-adjusted because of changes in the preamp settings, but using very high...
- Page 11 mono (2 conductor) ¼” cable and press down on the expression pedal, just like on a separate wah-wah pedal. For this to work, the EXP SWITCH parameter within the EXP PDL function must be set to WAH. The fourth way in which the WAH function is turned on is by recalling a Preset with this WAH parameter set to ON.
- Page 12 The delay time is modulated according to the rate and depth, creating a small amount of pitch bend in the delayed signal. The Theta Pro DSP has 4 voices, each separately delayed, modulated, and panned left or right, providing a lush stereo output.
- Page 13 SWITCH parameter within the Switch function must be set to CHORUS or CRS+FLA. 2. CRS MODE (CRS or PSHIFT): switches between the modes. 3. CHORUS MIX (0 to 100): Controls the relative mix between the original signal and all 4 delayed voices. 4.
- Page 14 octave shift. 3. PSHIFT MIX (0 to 100): Controls the relative mix between the original signal and the pitch shifted voice. 4. PSHIFT PAN (0 to 100): Pans the pitch shifted voice. 0 is fully Left, 100 is fully Right, and 50 is centered. 5.
- Page 15 a. DELAY (OFF or ON): Turns the delay OFF or ON. Controlled by the VALUE knob or the DELAY switch. Turning the Delay OFF mutes both the input and output of the delay, so the delayed output stops immediately. b. DELAY LEVEL (OFF to 0 dB): Controls the level of the delayed signal.
- Page 16 parameter is set to TREMOLO, the switch will turn off or on the tremolo, or if 2 is activated, the switch will allow tap setting of the tremolo rate. The LED will show the tremolo is on by blinking at the set rate.
- Page 17 f. EXP MAX2 (various): Allows you to set the maximum range of the expression pedal sweep. The units that appear with this parameter will change to match the units of the parameter selected above in 4. g. EXP SWITCH (OFF, WAH): Selects the ON/OFF function which is controlled by the EXP SWITCH jack.
- Page 18 For the touring musician, the FOH speakers may change in every different venue. If time permits, you may want to take the THETA PRO DSP out into the house, connect it, and adjust the DIRECT OUT EQ settings to your own preference (or have your tech adjust them from the stage) at the start of sound check.
- Page 19 the threshold in all presets equally. It is useful for situations where you are playing with a different guitar or in a different environment, where you need a temporary change in the decimator threshold, without having to change decimator settings within individual presets.
- Page 20 v. G: VOLUME PEDAL (OFF or ON): This would normally be set to ON, so that when you plug in an expression pedal to the VOL PEDAL jack, the pedal will become active. However, if the circuitry involved in reading the expression pedal were to fail, the volume could be stuck to maximum attenuation, and since Volume is a hidden parameter that can’t be adjusted, this parameter allows you Tallowing the unit to still be usable.
- Page 21 Parameter, which will display “G: LOCK COMBO”. Enter the unlock code 234, then turn the Parameter knob back to “G: P 101- 200 LOCK”. Now you can change the lock ON / OFF setting. Press Second / Store to save the new status. If you do not press Second / Save the changes will only be in effect while the unit is powered ON and the new settings will be lost on the next power ON.
- Page 22 STORE to save it, but you can wait until after you have edited the preset mapping to do this save. The STORE LED lights if any changes have been made to remind you to save it. Preset Mapping Function Turning the FUNCTION knob one more detent clockwise accesses this function. The LED above the RECALL 1 switch will light, and the preset that is mapped to that switch will be displayed.
- Page 24 WEIGHT 6.12 lbs DIRECT OUTPUT CONNECTION Balanced XLR POWER 9VAC RMS / 1.5 AMPS NOTE:0dbu = .775 VRMS THETA PRO DSP™ is covered under US Patents 6,944,305 and 7,532,730 THETA PRO DSP™ and INTELLIGENT SPEAKER™ are trademarks of ISP Technologies...
- Page 25 Any damage resulting from the misuse or the failure to follow the precautions and instructions will void the warranty. In the event that the unit needs to be repaired, please return the unit to ISP Technologies directly. Simply repack the unit, send a copy of the original receipt, a note stating the problem,...
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