Electone, the pedals are not limited to traditional bass notes but may instead produce many different sounds, including high-register tones. While MIDI pedalboards are typically used for musical sounds, since they use MIDI, technically the footpedals could be used to trigger lights or other electronic elements of a show. MIDI pedalboards offer a range of features. Some MIDI pedalboards contain velocity-sensitive triggers, which produce MIDI velocity information for musical dynamics. MIDI pedalboards such as the 13-note Roland PK-5 include a row of MIDI toe switches above the pedal keyboard, so the performer can select preset tones or MIDI channels or change the octave. Larger 25-note Roland pedalboards also include an expression pedal for controlling the volume or other parameters. In the 2000s, controller designer Keith McMillen developed a 13-note velocity-sensitive pedalboard, the 12 Step foot controller, a MIDI controller with a USB output that can be connected to a MIDI-equipped synthesizer or sound module. McMillen's pedalboard differs from other pedalboards in that it senses a variety of types of velocity and pressure, which the user can program to cause different effects on the synthesizer patch. McMillen's pedalboard can be programmed so that pressing an individual pedal triggers chords (up to five simultaneous notes), which a one person band could use to provide accompaniment for live shows. The Roland PK-9 and the Hammond XPK-200 are 20-note pedalboards that sound from low C to a high G. The Nord PedalKeys is a 27-note pedalboard, going from a low C to a high D. As compared with a 25-note pedalboard, the PedalKeys adds a high C# and a high D. Some MIDI pedalboards are designed for the church pipe organ market, which means that they use AGO specifications such as a 32-note range. Most pipe organ-style MIDI pedalboards are too unwieldy for transportation, so they are typically installed under the upper manuals. However, a German company makes a MIDI pedalboard with a hinge in the middle and wheels on the underside for easy transport. Since AGO-specification MIDI pedalboards are often priced in between US$1000 and US$3000, some amateur home organists make DIY MIDI pedalboards by retrofitting an old pedalboard with MIDI. Due to the popularity of theater organs and Hammond organs during the 1950s and 1960s, many organ parts are on the market—including pedalboards (often with less than 32 notes, such as 20 or 25 notes) that cost under US$300. After the pedalboard