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For pedometers and cycling computers with built-in MP3 players or smartphones with accelerometers.
This idea is similar in purpose to another idea in this category,
found during my pre-post search for prior art, but very different in
technology and implementation. I think it stands apart and is an
improvement over the other idea, but that's not
my call as the poster to make, is it?
MFD experts in the room?
Anyway, here it is:
Pedometers work by sensing movement. Shake them, and they
it. Some advanced pedometers even come with Mp3 players built in,
and handlebar-mounted cycling computers can even measure and
My idea is for a pedometer or cycling computer that measures
to select an appropriate song to match your speed at any given time.
Given that people generally walk and run with heavier or lighter
depending on mood, a sensitive-enough pedometer with the right
software should therefor be able to detect moods with a certain
degree of accuracy, and use that information combined with the
user's cadence to select songs of not only the right tempo, but mood
This could also probably be implemented in the form of a
application using the device's built-in accelerometer, for those who
prefer to use their phone for everything. See the Velocomputer app
(linked to in the Wiki link I posted) for if you have doubts about a
smartphone's accelerometer capabilities. I just downloaded it to my
phone to test it, and it friggin' works! Even counts cadence and tells
you with a weird voice if your cadence changes, saying 'cadence low'
or 'cadence normal' or 'cadence high'.
The similar idea.
[21 Quest, Dec 23 2009]
How pedometers work
[21 Quest, Dec 23 2009]
How cycling computers work
[21 Quest, Dec 23 2009]
"Or just tie it in with a pedometer ..." [phoenix, Dec 23 2009]
[A] music player with a small motion detection device, so that the beat of the music can be adapted to your jogging speed. [phoenix, Dec 23 2009]
Spotify adopting my idea!
//Another feature of Spotifys new version will be tempo detection, which the company said will use the phones movement sensors to locate a track that will keep pace with a users feet when he or she is working out// [21 Quest, May 20 2015]
||It only plays the last pair or group of chords, that end
each song? Or is this detecting cadences within the
music, for example, if a cadence is used as the
transition from middle eight
back to chorus?
||That's actually more thought than I'd put into it, Ian.
||I could foresee problems with positive feedback.
||[ian], I don't think  was using "cadence" in that technical/music-theory sense.
||What other meaning does it have - I've never heard it
used for anything other than what it actually means.
||[Ian], the beat, time, or measure of rhythmical motion or activity. (Merriam-Webster's Collegiate Dictionary, 10th ed.)
||Ian, I was referring to the military's definition of the word, which
also is the exercise community's. Cadence is the speed at which
you step or pedal. For instance, standard military marching
cadence is 2 steps per second. Doubletime is 4 steps per second.
||Hmm, no those aren't definitions of cadence - you're
both wrong. Whoever told you that, get back to them
and tell them they're wrong, and to get back to whoever
told them that that's what it is, etc. This sort of mistake
should be rectified.
||//(Merriam-Webster's Collegiate Dictionary//
That "dictionary" can't even spell "colour", "centre" or "labour" correctly - I wouldn't trust it as any kind of authority on the English language.
||A cadence isn't something that is repetitive or cyclic or
even just continuous, it's
single event that either terminates or marks a
shift or change to being or doing something else. It can't
be used to describe something that then carries on in
exactly the same way as before, over and over again.
That's not what it is - in fact, it's the opposite.
||Ah, the beautality of words.
||I think what [IT] is describing is the vowelly-challenged "rhythm".
||Sounds like a good idea, but how would the player/pedometer know the tempo of a song before it actually starts to play the song?
||The songs would be selected from a several playlists, each
playlist sorted by tempo, mood, and combinations thereof. It
may require a dedicated application to choose the appropriate
songs from each playlist, and would be easier to do if it just
chose from the downloaded music files in your phone, but could
also be done by streaming samples from a service like Pandora
and matching them to your mood and cadence. Lots of music
sites have the option of sorting songs by speed or genre. This is
just an extension of that same kind of program.
||One of the columns that iTunes can display is BPM -
Beats Per Minute - which is something any modern
popular music dj can't survive for very long without.
not displayed by default because almost no music has
that tag filled in, but if it did, then you could use the
BPM info to implement this, entirely in its entirety,
detecting your pace and matching your pace with the
BPM of the song. You'd have to go through your
collection and tag it all properly though. Maybe this
could be automated. (If you like classical music, you
could use Beats Per Minuet).
||Mood of mover is still going to be tricky. Another
data set is going to be needed on top of the cyclic
cadence. What would differentiate an angry song
with a happy song of same BPM? Bluetooth pressure
sensing insoles anyone.
||From what I read in the pedometer link, some pedometers and
trainers actually do integrate with shoe sensors for greater
accuracy. Not sure if they use Bluetooth, but some cycling
computers, particularly the Velocomputer, definitely do.
||21 Quest, that must be really satisfying, except to
wonder what took Spotify so long to implement your
||A further step (!) would be to sense the emotional
mood of a person, and pick music that can adjust
that for the better. If a person is angry and isnt
normally this angry, the music might just pace them
down an almost imperceptible amount, or if a person
is depressed a bit for a while, the chosen music might
pace them up a bit. Not just by slower-than or faster-
than tempo choosing, but also by lag or lead of the
beat to the heartbeat / breathing / footwork. Or
||It is satisfying... But it does the beg the question
you mention, with so many music streaming apps
available and the widespread adoption by the
unwashed masses of accelerometer-equipped
smartphones, why HAS this taken so long?