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Congratulations on your purchase of the MAINFRAME, a powerful but easy-to-use
sample rate reducer and bit crusher. Introducing old-school digital audio sounds
into your music has never been easier. A broad range of controls help you fine-
tune the digital artifacts, and the innovative Sample Rate Tuning Mode makes it
easy to match the sample reduction to a pitch, even on the fly. Access the
MAINFRAME and immerse your tone in the sounds of the arcades, consoles, and
terminals of yesteryear.
WARNING: Your Mainframe comes equipped with an Electro-Harmonix 9.6DC-200BI
power supply. The Mainframe requires 90mA at 9VDC with a center negative plug. Use
of the wrong adapter or a plug with the wrong polarity may damage your Mainframe and
void the warranty. Do not exceed 10.5VDC on the power plug. Power supplies rated for
less than 90mA will cause the Mainframe to act unreliably.
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Sample Rate Reduction ranging from 48kHz to 110Hz
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Bit Depth Reduction ranging from 24-bit to 1-bit
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Selectable High/Low/Band-Pass filter to shape the artifacts of the bit crushing
and sample rate reduction
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Sample Rate Tuning Mode allows you to set the sample rate to match the key
of a song, or continually adjust the sample rate based on what you play on
your instrument
•
Programmable preset or expression pedal setting allows you to save your
sound or control any combination of the Mainframe's knobs with an external
expression pedal
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Secondary knob parameters allow you to fine-tune the Mainframe's effect
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High quality buffered bypass and silent switching
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Audio input impedance: 2M
•
Audio output impedance the OUTPUT jack: 500
•
Current draw: 90mA
•
Maximum input signal level: 6.25 dBu (4.5V peak-to-peak)
- FEATURES -
- SPECIFICATIONS -
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Summary of Contents for Electro-Harmonix MAINFRAME bit crusher
- Page 1 MAINFRAME and immerse your tone in the sounds of the arcades, consoles, and terminals of yesteryear. WARNING: Your Mainframe comes equipped with an Electro-Harmonix 9.6DC-200BI power supply. The Mainframe requires 90mA at 9VDC with a center negative plug. Use of the wrong adapter or a plug with the wrong polarity may damage your Mainframe and void the warranty.
- Page 2 ONTROLS AND ONNECTIONS 1. VOL Knob This knob sets the master output level of the Mainframe. 2. BLEND Knob This knob blends between the dry guitar signal and the effect signal. As the knob is turned clockwise, the output ranges from completely dry guitar to a fully effected signal with the filter applied.
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Page 3: Input Jack
6. FILTER FREQ This knob controls the frequency of the Mainframe’s filter. As the knob is turned up, the frequency increases. The frequencies cut/passed by the filter vary by the filter type: HPF: Frequencies above the FREQ knob setting are passed, frequencies below are cut. - Page 4 AMPLE UNING In Sample Rate Tuning Mode, the Mainframe analyzes your input signal in real-time, and sets the sample rate to match the pitch of your signal, or a set interval above your signal. You can use this mode to lock the sample rate to a certain pitch for a song, or you can keep it constantly tuning along with every note you play.
- Page 5 PRESERVING OR DISCARDING THE TUNED SAMPLE RATE • Once locked, the tuned sample rate will be maintained even if the pedal is powered off and on. • To discard the tuned sample rate, turn the SAMPLE RATE knob, or re- enter Sample Rate Tuning Mode by double-tapping the footswitch.
- Page 6 RESET AND XPRESSION EDAL The Mainframe can store one custom setting in memory. This custom setting can function as a preset with a snapshot of the toggle switch and each knob position, or as a custom expression pedal setting allowing you to sweep any combination of knobs between two saved positions in any direction.
- Page 7 CREATING A CUSTOM EXPRESSION SETTING 1. Press and hold the EXP/PRESET button until the green LED starts blinking slowly. This is heel-acquisition mode for an expression setting. 2. Turn any of the knobs to the settings you would like to use for the heel position of the expression pedal.
- Page 8 RECALLING / UNLOADING A PRESET OR EXPRESSION SETTING 1. Press and release the EXP / PRESET button. The green LED will light, and the Mainframe will load your saved expression setting or preset. 2. If an expression pedal is present, any knobs that are saved to the expression setting are disabled and the expression pedal controls those parameters.
- Page 9 POWERING UP WITH A SAVED PRESET OR EXPRESSION SETTING If power is removed from the Mainframe while a preset or expression setting is active, it will be active when the Mainframe is powered up again, regardless of knob and toggle switch position. Note: If there are alterations that haven’t been saved when power is removed from the Mainframe, the changes will be lost and the saved version of the preset or expression setting will be loaded.
- Page 10 ECONDARY UNCTIONALITY The Mainframe allows you to take even more control over the bit crushing effects by accessing “hidden” parameters through Secondary Knob Mode. Use the secondary knob functions to fine tune the exact tone you want from the Mainframe. USING SECONDARY KNOB MODE 1.
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Page 11: Tips And Tricks
Input gain FILTER PEAK Knob: Controls the input gain of the Mainframe. As this knob is turned clockwise, the gain increases, producing a hard-clipping distortion. Factory default is with this knob fully counter-clockwise. ERASING SECONDARY KNOB SETTINGS To erase all secondary knob settings and restore them to factory defaults, first unplug the Mainframe from power. - Page 12 NFORMATION Please register online at http://www.ehx.com/product-registration or complete and return the enclosed warranty card within 10 days of purchase. Electro-Harmonix will repair or replace, at its discretion, a product that fails to operate due to defects in materials or workmanship for a period of one year from date of purchase. This applies only to original purchasers who have bought their product from an authorized Electro-Harmonix retailer.
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