mxr dyna comp settings

i currently play guitar for my church band and need some help as this is my first compressor pedal buy. The Dyna Comp Compressor can tighten up your signal, add rich sustain, or create the percussive and clicky sound heard on numerous hit records. I'm planning on getting a compressor pedal, and I'm set on one of the MXR's. A stereo guitar input jack could be used as an on-off switch, connecting the battery (-) pin to ground when the mono guitar jack is plugged. The CA3080 has a differential input, it amplifies the current differences between the inverting (-) and non-inverting (+) inputs. In practice, this trimmer is adjusted to the middle position and in very very very rare occasions it is adjusted to any other value. All the pedals feature adjustable attack, and the 2026 and Cali 76 also have adjustable release. The OTA Amplifier is the heart of this effect.To understand its functionality, it is important to understand the concept of how an audio compressor works: The aim of the OTA is to apply a variable gain to the original guitar signal, giving more amplification to weak signals and less to the hi-level waveforms. CA3080 Datasheet.CA3080 Application Note (AN6668).Don Tillman great article about the CA3080 background. With this in mind, compressor pedals need at least two controls to be effective. The 2K trimmer resistor adjusts the bias currents of the OTA differential inputs, trying to make a perfectly balanced OTA. This control gives amazing subtlety to compression. I'm not around right now. Like the Dyna Comp, you just get two controls- sustain (the same as the Dyna Comp’s “sensitivity”) and level. The C5 cap (1nF) cap placed at the output of the OTA will smooth out the excess of hash high harmonics, in orange and red the difference can be observed. This averaged value will indicate how loud the guitar signal is: When the level of the guitar signal starts to rise (at around 1Vpp), the blue averaged signal decreases from 9V to 0V, giving less current feedback to the OTA. Being music makers ourselves, we love geeking out on all things gear. Description. They have a reputation for being quite noisy. This page was generated at 06:41 AM. Page 1 M102 DYNA COMP 92503016097revB...; Page 2: Controls M102 DYNA COMP COMPRESSOR ® DESCRIPTION POWER DIRECTIONS SPECIFICATIONS • Rotate OUTPUT knob clockwise Input Impedance 1 MΩ • In-line compressor “evens The Dyna Comp is powered by one • Run a cable from your guitar out” your signal to the Dyna Comp’s INPUT jack to increase overall volume of Output Impedance 10 kΩ 9 … MXR® DYNA COMP® COMPRESSOR. Now is the perfect time to get the gear you want with simple, promotional financing. e-mail us at This email address is being protected from spambots. You need JavaScript enabled to view it. The Power Supply block provides +9V supply to the circuit components and also an unusual bias of +2.5V with resistor divider (R15 and R16) to be used as a virtual ground to the CA3080 and also as a bias voltage for the transistor stages: The Input Buffer is implemented using a basic Common Collector (Emitter Follower) transistor circuit. In Part 2 and Part 3, I’ll show in detail some typical and not-so-typical compressor settings and uses. Seems that the original design did not include decoupling caps in the power supply, but a moderate-high value 10uF caps (C10 and C11) could be included to remove noise from the power supply line. My sincere appreciation to Eric (ontheroadeffects), C. Chiuchiolo and Dror S. for your support. This pedal produces dynamic range compression, this is basically smooth out volume differences between notes; giving more body and level to weak notes so the sound does not change drastically no matter what the real signal level is, giving better articulation and sustain to the guitar. All are welcome, from seasoned pros to absolute beginners. MODERN COMPS- Wampler EGO, Suhr Koji, Bondi 2026, Origin Cali 76. This equalization is often attributed to a pre-emphasis / de-emphasis method to reduce noise (the CA3080 is a pretty noisy part) and also will give some signature to the sound of the pedal. With the simplified middle circuit, the bias at the input of the CA3080 (Vx) can be calculated as: Vx= R5 *[9V/(R5+(R4//Zin//Zin//R6))] = 470 * [9V/(1M//1M//1M//1M)] = 3.1V. This website uses cookies to improve your experience. The net effect is evenness and sustain, as the attack of a note is softer and its decay is louder. A control for the amount of compression, which may be called “sustain,” “sensitivity,” etc., will increase the overall effect when turned up. Discussion in 'Effects [BG]' started by Badmuthaplucka, Jan 28, 2019. However, in the real application this fc is: The output series 0.05uF capacitor C9 can be enlarged to a 1uF to give to the effect a full bottom end response. From the tweakiest techniques to the biggest ideas, our experts work hard to constantly supply inSync with a steady stream of helpful, in-depth demos, reviews, how-tos, news, and interviews. The attack mod makes the effect more flexible to play different styles of music. To make the circuit easier to understand, it is divided into 5 blocks: Input Buffer, OTA Amplifier, Envelope Detector, Output Stage and Power Supply: The main design idea is this: The Input and Output Buffers isolate the circuit, keeping good signal integrity. Some Rights Reserved, you are free to copy, share, remix and use all material.Trademarks, brand names and logos are the property of their respective owners. 5501 U.S. Hwy 30 W, Fort Wayne, IN 46818 get your feet wet with mxr ® chorus. var prefix = 'ma' + 'il' + 'to'; select the forum that you want to visit from the selection below. It also has two switchable channels with separate attack and sustain settings. Pete is excited to be a part of the amazing film: Ampire: The Sound Of Music. mxr ®: the rackmount era. The D2 diode could clip the output signal making the signal distorted, this is why some people decide to remove the bottom envelope detector (by disconnecting C7) and just use the top one. The Philosopher King even adds an ADSR envelope for truly unique tones. To start viewing messages, var addy239b9c22d2d925a238639414a154439f = 'info' + '@'; Jan 28, 2019 #1. MXR Dyna Comp Mini £115. This block provides the current feedback to the OTA amplifier in order to create the compression effect: Above image: the averaged signal in blue color (measured at the C8 cap) changes following the amplitude of the guitar signal in purple/green colors (measured after the phase-splitter at R11 and R12): MOD: Disconnecting C7: If you check the full schematic the output of the pedal is also connected to the emitter of Q2. Don Tillman great article about the CA3080 background. Therefore, with more loud sounds being pushed down in volume, or compressed, the overall sound seems quieter and a volume control is needed to compensate. The original MXR Script model which is not available nowadays uses the classic MXR white/yellow PCB with a distinctive shape. MXR Dyna Comp Bass Compressor (Mini!) The Bends offers OTA-based circuitry that places it in the lineage of the MXR Dyna Comp et al. Many comps have more controls, including Attack, Tone, and Blend. There’s a sensitivity control that adjusts the amount of (and the onset of) compression, and an output gain control. The Rivera Sustain Shaman has a switch labeled “Super Sustain” that holds the notes for an incredibly long time. i have a fulltone ocd and a boss sd 1 as my overdrives. The signal is one of the most important things when it comes to flanger pedals, and a compressor is a must-have if you want a very good pedal for yourself. Sweetwater Sound This model is neither the most silent nor the most hi-definition piece of gear but it has real character and it's easy to find. It's the effect part you mentioned, especially for electric 12.Think The Byrds, Tom Petty, R.E.M. Usually, the Envelope Detector stage is represented in parallel looking like a Long Tailed Pair or a Differential Amplifier that could be misleading. Is the Supercomp essentially a Dynacomp with the additional knob? These pedals represent some of the latest, most feature-laden compressor pedals on the market. You can squash the tone significantly, and still retain a natural sound by blending in some dry signal. The Wampler Ego and Seymour Duncan Vise Grip have variations on all three of these controls. addy239b9c22d2d925a238639414a154439f = addy239b9c22d2d925a238639414a154439f + 'electrosmash' + '.' + 'com'; They were durable and readily available, and I’m pretty sure the CS2 might be one of the earliest compressor pedals to feature an attack knob. note: The Rtrimmer is ignored because its value is much smaller than R4, R5, R6 or Zin. i play a gibson les paul with mini humbuckers into a micked marshall class 5 combo. For clarity, a compressoris a device that reduces the dynamic range of an audio signal; it makes the quiet sounds louder and the loud sounds quieter. Output Stage.7. The cut frequency of the output low-pass filter changes slightly with the level potentiometer (RV2). The Ego, Cali 76 and Koji feature mix controls, and this allows the user to blend the compressed sound with dry signal. note: The value of β is 300 (taken from the 2N5088 datasheet), the value of rπ is very small compared with the value of (β+1)xR3 and can be considered as 0 (ignored). document.getElementById('cloak239b9c22d2d925a238639414a154439f').innerHTML = ''; Disconnecting C7: If you check the full schematic the output of the pedal is also connected to the emitter of Q2. What do you all recommend? No matter how heavily compressed the setting is, the uncompressed sound can be turned up above it. or     Usually, the bias point sits around 3~4V (depending on the CA3080 current bias pin). The MXR 102 Dyna Comp is a compressor effect guitar pedal, released in 1972 by MXR and rapidly becoming popular because of its price and ease of use. 1.2 MXR Dyna Comp Part List / Bill of Materials. It also forms a high past filter together with the resistor R14 and VR2. Seeing as the MXR is hailed as one of the best around, it was my first choice. link above. var addy_text239b9c22d2d925a238639414a154439f = 'info' + '@' + 'electrosmash' + '.' + 'com';document.getElementById('cloak239b9c22d2d925a238639414a154439f').innerHTML += ''+addy_text239b9c22d2d925a238639414a154439f+'<\/a>'; This pedal produces dynamic range compression, this is basically smooth out volume differences between notes; giving more body and level to weak notes so the sound does not change drastically no matter what the real signal level is, giving better articulation and sustain to the guitar, stage is represented in parallel looking like a, Long Tailed Pair or a Differential Amplifier, J1, J2                        Audio Jacks. MXR Dyna Comp Schematic. Raise the level up, and set the sustain control for just subtle “squish”, and you can use the Boss compressors as a colored boost. Transconductance is a way to measure the gain of an amplifier relating the input voltage with the output current and usually designated with the letter gm and measured in Siemens. Exclusive deals, delivered straight to your inbox. I love MXR and it was so popular that I thought I'd try it. There is a filter in the non-inverting input: R7(15KΩ), C3(1uF) and C4(10nF) that creates a low pass filter making the frequency response to be different in each input: The blue line (CA3080 positive input) level is slightly smaller (~1dB) than the negative input, it is due to a small signal bleed through the Rtrimmer and R5/R6. The Keeley 4-Knob has a Clipping knob that controls input level and the Budda Chakra has a knob labeled Gain. Talk with your fellow tone freaks on the web's liveliest (and friendliest!) MXR® CARBON COPY® MINI ANALOG DELAY: A little delay. Attack controls how quickly the compression actually happens, which is why a higher setting can give the note a “pop” as you strike it. 4.1 The OTA Chip: CA3080.5. Discussion in 'The Tone Zone' started by jordame93, Feb 2, 2013. The low frequencies area is dominated by the high-pass filters that place two poles on 3.1Hz and 0.15Hz creating a roll-off for the low harmonics.

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