Technical Specifications - Electro-Harmonix Stereo Talking Machine Quick Start Manual

INPUT – Connect the output of your instrument or another effects pedal to this
jack.
SEND / RETURN – An optional effects loop can be used to add additional effects
pedals between the STM's preamp and filter sections without any alteration to the
instrument's original dynamics. The external effect(s) will be active in the wet mix of
the STM's output, and will be bypassed when the STM is itself in bypass mode.
Connect the SEND jack to the external effect's input; connect the RETURN jack to
the external effect's output.
MONO/L and R OUTPUTS – The STM can be operated in mono (single output) or
stereo (dual output) configuration. In stereo configuration, VOICE modes WAH, BB,
AH-OO, AH, OW-EE produce a pan sweep in sync with the filters; VOICE modes EE,
EE-ER, AH-I, I-A shift the filters differently for each output to produce a wide, lush
sound field. Connect the MONO/L jack to the input of your primary amp. For stereo,
connect the R jack to the input of your secondary amp.
EXP PEDAL – An optional expression pedal* can be plugged into this jack for
manual control of the STM's filters, enabling interaction similar to that of a wah-wah
pedal. The SENSITIVITY knob will still allow the envelope generator to sweep the
filters based on the dynamics of the instrument, so the knob should be turned to 12
o'clock to disable the envelope response. If the auxiliary functions are enabled, the
LFO may also modulate the filters while sweeping the expression pedal. The toe/heel
positions can be swapped by moving the SENSITIVITY knob slightly into the
negative range.
*The expression pedal must have a Tip-Ring-Sleeve connection. It is important that the
expression pedal have the correct polarity. The tip of the plug must be connected to the wiper
of the potentiometer inside the expression pedal. If you are not sure what type of expression
pedal to use, try one with a polarity switch so that it will work with many different types of
instruments. Some suggested Expression Pedals: M-Audio EX-P, Moog EP-2, Roland EV-5 or
Boss FV-500L. You may also connect a control voltage to the jack. The Control Voltage range
must be between 0 V to 5 V.
Use the supplied AC adaptor to power the STM. Plug the barrel connector of the
adaptor into the 9V power jack located at the top of the unit. The STM requires 9 –
9.6VDC at 200mA with a center negative plug. The STM accepts Boss™ style AC
adaptors. The actual current draw of the STM is 185mA.
Sample Rate:
A/D and D/A Conversion Bit Resolution:
Processed Audio Bit Resolution:
Input Jack Impedance
INPUT:
RETURN:
– I/O CONNECTIONS –
– POWER –
– TECHNICAL SPECIFICATIONS –
2.2 MΩ
2.2 MΩ
46875 Hz
24 bits
32 bits
Output Jack Impedance
MONO/L:
SEND:
220 Ω
R: 1.1 kΩ
1.1 kΩ
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