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# Thomann's Cool Online Guides: Wah Pedals

## 10. Digital Products

Put simply, digital designs allow for much greater versatility, as we shall now discover. Digital pedals do not employ discrete analogue components at their hearts, but instead use DSP (Digital Signal Processing) technology to ‘physically model’ the most popular units of yesteryear. But how does physical modelling work?

In order to ‘model’ the sound of a classic pedal, the first thing the design engineer needs is a complete understanding of the inner workings of the original unit. He’ll take it to bits and examine every component within the circuit. He’ll then spend hours taking detailed electronic and acoustic measurements and performing listening tests, until he has eventually built up a complete profile of the device and understands how it works, both electrically and mechanically.

Now it is his job to try to represent these characteristics using a mathematical model that can be stored in digital circuitry and used in real-time to ‘flavour’ your guitar signal, in exactly the same way as the original ‘classic’ wah would have done. This of course is easier said than done! With the sheer number of variables involved, and the huge amount of interaction that inevitably goes on between the various components, trying to come up with a workable global mathematical model like this is very difficult to say the least. So the model is usually built up from smaller pieces - each piece is a mathematical equation or ‘algorithm’ which describes the working of just one part of the original circuit’s function – perhaps a representation of how a transistor works, or maybe the resistors and capacitors comprising the filter section.

Provided that each component has been modelled properly, and under all extremes of operation, the ‘virtual’ components can be assembled – just like building the real thing – into a ‘composite object’ which will then run like a computer program inside the host, mirroring the characteristics of the original wah-wah with all of its nuances and interactivity. As the pedal is effectively a small computer processor running a program, it is possible to imagine selecting from a list of alternative built-in programs using a simple control knob, calling up different models of well known wah-wah pedals, and this is in fact exactly what digital pedals offer. Note that digital units use ADC (Analogue to Digital Conversion) at the input and DAC (Digital to Analogue Conversion) at the output. When the unit is bypassed, even though the effect is disabled, the signal still goes through ADC and DAC, and some claim that they can hear this. With modern conversion techniques this is unlikely – a quick test with your own gear should put your mind at rest.

The Boss PW-10 – a digital pedal

A good example of a digital pedal is the Boss PW-10 (V-wah), which offers faithful emulation of Crybaby, Vox, Morley, and many more. In addition, the pedal operation is ideally suited for controlling other effects, and so rotary speaker, Roto-Vibe and talkbox emulation (as made famous by Peter Frampton) are also provided. Some digital pedals also have the provision to store a selection of favourite sounds and settings in internal memory – three in the case of the PW-10, whose stored sounds can be recalled by using an innovative heel operated switch under the back of the pedal.

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# Wah Pedals yleiskatsaus

Suositellut
Alesis Surge Mesh Kit

E-Drum Set 385 Sounds, 40 kits, 60 songs, Additional input for a fourth tom and a second crash pad, 2 Master outputs 6.3 mm mono jack, Headphone output 3.5 mm stereo jack, Aux input 3.5mm stereo jack, MIDI input...

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598 €
(1)
Suositellut

Active Nearfield Monitor Equipped with: 5" woofer and 1.9" U-ART ribbon tweeter, 2x Class-D amplifiers: 50W RMS woofer, 20W RMS tweeter, Frequency range: 45 - 25000 Hz, Crossover frequency: 3 kHz, Maximum input level: 106 dB (1m/pair), Rear bass...

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169 €
Suositellut
Subpac M2X

Subpac M2X, Mobile tactile bass system, SubPac adds real depth, connection and enjoyment to whatever you play through it - your music and media comes to life with the added dimension of physical bass. Frequency Response: 1hz-200hz, Wired Input: 3.5mm...

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398 €
(1)
Suositellut
Roland R-07 black

Portable MP3 / WAV Recorder with Bluetooth Functionality Stereo recordings up to 24 Bit / 96 kHz in WAV format or up to 396 kbps in MP3 format on microSD / SDHC card, Built-in stereo microphone, Integrated hybrid limiter,...

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233 €
Suositellut
Yamaha Stagepas 600BT

Mini-PA System with Bluetooth Function Consisting of 2x passive 2-way boxes and 10-channel power mixers, Power mixers and speaker cables can be stored in the boxes for transportation, Successor of the Stagepas 600i, Including 2 speaker cables, each 6...

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815 €
Suositellut
Focal Listen Professional

Headphones Closed, Circumaural, Conversion technology for acoustic transparency and dynamics, Impedance: 32 ohms, Sensitivity (@ 1 kHz - / 1 Vrms): 122 dB SPL, THD (THD, @ 1 kHz / 100 dB SPL): 0.3%, Frequency range: 5 Hz to...

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249 €
Suositellut
Heritage Audio HA-73 EQ Elite

Heritage Audio HA-73 EQ Elite; 1-Channel Mic-Preamp wit EQ; based on the 1073; hand wound Carnhill Transformers; 3 stage fully discrete class A mic preamp; max. Gain: 80 dB Mic and 50 dB Line; -20 dB Pad; LO-Z switches the...

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949 €
(1)
Suositellut
Epiphone Richie Faulkner Flying V

Electric Guitar Body and neck: Mahogany, Fretboard: Ebony, Neck profile: Thin C, 22 Jumbo frets, Scale: 628 mm, Pickups: Active EMG 57 (bridge) and EMG 66 (neck) humbucker, Floyd Rose 1000, Grover Rotomatic machine heads, Colour: Black, Incl. Deluxe...

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935 €
Suositellut
Fender SQ Affinity P-Bass PJ OWT IL

Electric Bass Affinity series, Body: Alder, Neck: Maple, Fretboard: Indian Laurel, Neck profile: "C", Scale: Long scale, Nut width: 41 mm, 20 Medium jumbo frets, Synthetic bone nut, Pickups: 1 Jazz and 1 Standard Split Precision single coil, 2...

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225 €
Suositellut
Rockett The Melody Overdrive

Rockett The Melody Overdrive - EQ / Drive, overdrive / EQ effects pedal, developed for Mark Lettieri (Snarky Puppy), graphic 6-band EQ, up to 18 dB boost/cut per band, true bypass, incredible tonal flexibility, controls for output Volume, and Gain,...

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244 €
(1)
Suositellut
Focal Shape Twin

Active Near Field Monitor Tweeter with low directivity for flexible listening position, Closed design with two passive membranes for easy installation near the wall, 2.5-Way concept for optimal control of the bass and lower mids, Optimal integration through extensive...

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849 €
Suositellut
Yamaha Stagepas 400BT

Mini-PA System Bluetooth Function Consisting of 2x passive 2-way boxes and 8-channel power mixers, Power mixers and speaker cables can be stored in the boxes for transportation, Successor of the Stagepas 400i, Including 2 speaker cables, each 6 m...

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569 €
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