For a while, my pedal sustained when NOT depressed, sort of a reverse functionality, which I actually appreciated...but can't replicate. Anyone else?

According to the FAQ on the manufacturer's web site (for the SP-Double and SP-Triple), ¨Are the pedals switchable? The pedals will not have a switch to change polarity and will operate as normally open. This means that the pedal will send a value of 0 when up and a value of 127 when pressed down all the way. Different manufacturers may program their keyboards to respond to the opposite (127 when up, 0 when down) and to combat this some pedals may come with a switch to change the polarity of the pedal to match that of the keyboard. Typically, though there are ways around this without the need for the switch.¨ (The article is on the manufacture's website at: http://m-audio.com/kb/article/1967 )

Does this pedal have a gradient on the sensitivity for the sustain, OR is it an on/off sustain switch?

It appears this is a simple on/off switch pedal. For continuous or gradient performance the phrases to look for in sustain pedal description are "half-damper" or "half-pedaling." If there is no indication by the manufacturer of one of those descriptions, the pedal is just an on/off switch. If your digital piano or electronic keyboard supports half-damper, then a half-damper pedal varies the nature of the sustain effect based on how far down you depress the pedal. The only half-damper pedals I have found so are the Yamaha FC3A, Roland DP-10, and Korg DS1H. The half-damper effect emulates the action on an acoustic piano of lifting the felt damping pads only part way off of the strings.

Where is the cable of the pedal?

its permanently attached to the pedal.

Does this pedal work with all Korg keyboards?

The pedal has reversible polarity, so it will work with all keyboards.

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Description

🎧 Elevate your sound game — because your ears deserve the best.

CUSTOM COMFORT FIT - 180-degree rotatable frame with leather cushioning and flexible headband for all-day wear.
BUILT TO LAST PERFORM - Durable stainless steel arms combined with premium materials for reliable, long-term use.
UNIVERSAL COMPATIBILITY - 32Ω impedance and 95dB sensitivity work seamlessly with smartphones, consoles, and pro gear.
EXTENDED REACH NO LIMITS - 2.7-meter cable ensures freedom of movement without compromising connection quality.
STUDIO GRADE SOUND PRECISION - 40mm neodymium drivers deliver crystal-clear audio for monitoring and podcasting.

The M-Audio HDH40 headphones feature powerful 40mm neodymium drivers and a closed-back design for superior sound isolation. With a 180-degree rotatable frame, leather cushioning, and a flexible headband, they offer exceptional comfort for long studio sessions. The 2.7m cable and 32Ω impedance ensure broad compatibility with smartphones, gaming consoles, and professional audio equipment, making these headphones a versatile choice for recording, podcasting, and private listening.

Specifications

Noise control	Sound Isolation
Sensitivity	95 dB
Headphone jack	3.5 mm Jack
Model name	HDH40
Connectivity technology	Wired
Wireless communication technologies	Wireless
Included components	Cable, Ear Cushions, Headband
Age range (description)	Adult
Material	Leather Stainless Steel
Specific uses for product	Studio
Recommended uses for product	Recording
Compatible devices	Smartphones, Gaming Consoles, Pro Audio Equipment
Control type	Media Control
Cable feature	Detachable
Item weight	0.6 Pounds
Water resistance level	Not Water Resistant
Frequency range	15 Hz – 28 kHz
Package type	FFP
Unit count	1 stück
Style	HDH40 - Piano Headphones
Control method	Touch
Number of Items	1
Item Weight	272 g
Product Dimensions	9.14 x 15.24 x 20.12 cm; 272.16 g
Item model number	HDH40
Color Name	Black
Connector Type	1/4 inch
Material Type	Leather Stainless Steel
Size	One size
Hardware Platform	Gaming Console, Smartphone

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