Boston BFS-40
The Boston BFS-40 sustain pedal is made of metal and has a very robust construction - the body is made of plastic, and the anti-slip rubber on the bottom does not allow it to slide on the floor. Comes with a 1.8 m cable with a large connector (6.3 mm jack). If you have a keyboard with adjustable pedal settings, you can also use the BFS-40 as a footswitch.
Due to the polarity switch, it is modeled after the damper pedals found in grand pianos. With its switchable polarity, it can be used with almost all MIDI keyboards and digital pianos. Mainly used as a sustain pedal (reverb pedal), however, it can be assigned many different functions depending on the connected instrument. Can be used with all famous brands such as Yamaha, Roland, Korg, Casio, M-Audio, etc.
The sustain pedal lengthens the duration of the notes, making the sound of a synthesizer or digital pinano sound melodious and spacious. When the pedal is depressed, the sound of the strings is not muted, so after releasing the key, a persistent sound is heard, it gives the instrument a special expressiveness and fullness of sound.
For beginners and not particularly demanding musicians, an inexpensive plastic model is suitable. The metal pedal is much more practical. The coupling of the pedal to the floor is important - this is very important for the active use of the effect.
Polarity switch
If you connect the pedal to an instrument, and it works “the other way around,” produces an effect in the lowered position, then the polarity mode in which the pedal operates does not match the polarity mode of your instrument. There are two modes in total: normally open and normally closed. Sometimes you can change the mode inside the keyboard, but not all models support this option. Therefore, it is better to purchase a pedal with a built-in polarity switch.