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Re: [AUDITORY] MIDI Drum Pads: Delay and temporal resolution
Apparently one can get a tap-to-sound latency of 5.8 ms in
To get below 1 ms I would probably connect a piezo film to an Arduino
or something like that.
At 10:04 PM 6/18/2013, SKoT McDonald wrote:
In 2006 at FXpansion, we made
measurements of different drum module's latencies as part of an
investigation into why certain users were experiencing bad latency with
their e-drum kits when using our BFD range of drum software.
We found that Roland TD-20s were quite slow - it seems their propitiatory
COSM modelling of impacts added 1-2 ms, even for MIDI-only event output;
positional information was sent before the note onset in the form of MIDI
CC messages - each 3-byte MIDI message adds 1ms - and some pads were
sending 2-3 MIDI CC messages (hihats in particular!). The TD20 of the
time had no USB MIDI option.
A Yamaha DTX kit by contrast had less pre-processing of impacts, a USB
connection for MIDI, and less MIDI CC positional information, which I
think you could switch off too - this made the Yamaha "brains"
about 3-4 ms faster to get a MIDI Note to the sequencer or instrument on
Our audio devices tended to be high end, such as RME Firefaces with 64
sample buffers (~1.5ms @ 44.1kHz).
Considering that ~6ms is the border of average human timing discernment,
we found "rhythmically highly trained" subjects, like drummers,
were capable of being put off by the TD-20's lag, despite being the
highest priced kit in the market. We hassled Roland for many years to at
least add a MIDI USB connection...
On 18/06/2013 7:09 PM, Andre Holzapfel wrote:
we will have a paper in this years SMC conference related to the
acquisition of tapping data using software implemented at INESC TEC in
We did an experiment to determine the overall latency when using a MIDI
interface (Roland Handsonic HPD-10) connected through a Digidesign USB
sound card to a 2012 iMac. The obtained latency was 17ms. I do not know
how much you can gain by using more high end interfaces, but I would
agree with the previous response, that it is very unlikely to get even
close to sub-millisecond accuracy using MIDI.
Please let me know about your further investigations, contact me if you
like to obtain the paper in advance.
Quoting Benjamin Schultz
Dear Auditory List,
I am currently looking at purchasing a MIDI Drum Pad for experimental
research involving finger tapping. There appears to be very little
information regarding how much of a time delay there is between the pads
being tapped and the sound being produced (via external MIDI devices or
the drum pad's internal sequencer).
I'm looking to have the smallest time delay possible (sub-millisecond
would be ideal). Does anyone have any advice about the best device to use
and what kinds of time delays I should expect from the device? Their unit
of pulses per quarter note does not appear to be very
Dr. Benjamin G. Schultz
Sequence Production Lab
Stewart Biology Building
1205 Dr. Penfield Ave., Montreal H3A 1B1
Montreal, Quebec H3A 1B1
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Julius O. Smith III <jos@xxxxxxxxxxxxxxxxxx>
Prof. of Music and Assoc. Prof. (by courtesy) of Electrical
CCRMA, Stanford University