Does anyone know how auto tuners work - as in the box that you play a note
to, and it tells you what note you are playing, and whether or not it is in
tune? I am trying to write some musical transcription software for my final
year project, and thought that modelling an autotuner's functionality may be
the best way to go about this - as opposed to the more traditional windowing
and fft-ing approach.

Thanks in advance,

John

Does anyone know how auto tuners work - as in the box that you play a note
to, and it tells you what note you are playing, and whether or not it is in
tune? I am trying to write some musical transcription software for my final
year project, and thought that modelling an autotuner's functionality may be
the best way to go about this - as opposed to the more traditional windowing
and fft-ing approach.

If it only has to handle a relatively narrow frequency range (a few
octaves), and doesn't have a lot of noise to content with, then it'd
probably be possible to use a phase-locked loop (and translate the
resulting control voltage to a note value), or to feed the signal into
a Schmitt trigger and then count the number of zero-crossings per
second.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

Does anyone know how auto tuners work - as in the box that you play a note
to, and it tells you what note you are playing, and whether or not it is in
tune? I am trying to write some musical transcription software for my final
year project, and thought that modelling an autotuner's functionality may be
the best way to go about this - as opposed to the more traditional windowing
and fft-ing approach.

If it only has to handle a relatively narrow frequency range (a few
octaves), and doesn't have a lot of noise to content with, then it'd
probably be possible to use a phase-locked loop (and translate the
resulting control voltage to a note value), or to feed the signal into
a Schmitt trigger and then count the number of zero-crossings per
second.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

Does anyone know how auto tuners work - as in the box that you play a note
to, and it tells you what note you are playing, and whether or not it is in
tune? I am trying to write some musical transcription software for my final
year project, and thought that modelling an autotuner's functionality may be
the best way to go about this - as opposed to the more traditional windowing
and fft-ing approach.

If it only has to handle a relatively narrow frequency range (a few
octaves), and doesn't have a lot of noise to content with, then it'd
probably be possible to use a phase-locked loop (and translate the
resulting control voltage to a note value), or to feed the signal into
a Schmitt trigger and then count the number of zero-crossings per
second.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

Does anyone know how auto tuners work - as in the box that you play a note
to, and it tells you what note you are playing, and whether or not it is in
tune? I am trying to write some musical transcription software for my final
year project, and thought that modelling an autotuner's functionality may be
the best way to go about this - as opposed to the more traditional windowing
and fft-ing approach.

If it only has to handle a relatively narrow frequency range (a few
octaves), and doesn't have a lot of noise to content with, then it'd
probably be possible to use a phase-locked loop (and translate the
resulting control voltage to a note value), or to feed the signal into
a Schmitt trigger and then count the number of zero-crossings per
second.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

In simple terms, it would have a type of set of frequency band pass
circuits. The outputs are measured, and then translated to display using
some logic circuits of types. Another approach would be to use a frequency
counter, and from the values measured, follow a scaling to display the
results.

In anycase, these instruments can be fairly sophisticated internally in
comparison to how simple they look.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"John Bevan" wrote in message
...
Does anyone know how auto tuners work - as in the box that you play a note
to, and it tells you what note you are playing, and whether or not it is in
tune? I am trying to write some musical transcription software for my final
year project, and thought that modelling an autotuner's functionality may be
the best way to go about this - as opposed to the more traditional windowing
and fft-ing approach.

Thanks in advance,

John

In simple terms, it would have a type of set of frequency band pass
circuits. The outputs are measured, and then translated to display using
some logic circuits of types. Another approach would be to use a frequency
counter, and from the values measured, follow a scaling to display the
results.

In anycase, these instruments can be fairly sophisticated internally in
comparison to how simple they look.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"John Bevan" wrote in message
...
Does anyone know how auto tuners work - as in the box that you play a note
to, and it tells you what note you are playing, and whether or not it is in
tune? I am trying to write some musical transcription software for my final
year project, and thought that modelling an autotuner's functionality may be
the best way to go about this - as opposed to the more traditional windowing
and fft-ing approach.

Thanks in advance,

John

In simple terms, it would have a type of set of frequency band pass
circuits. The outputs are measured, and then translated to display using
some logic circuits of types. Another approach would be to use a frequency
counter, and from the values measured, follow a scaling to display the
results.

In anycase, these instruments can be fairly sophisticated internally in
comparison to how simple they look.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"John Bevan" wrote in message
...
Does anyone know how auto tuners work - as in the box that you play a note
to, and it tells you what note you are playing, and whether or not it is in
tune? I am trying to write some musical transcription software for my final
year project, and thought that modelling an autotuner's functionality may be
the best way to go about this - as opposed to the more traditional windowing
and fft-ing approach.

Thanks in advance,

John

In simple terms, it would have a type of set of frequency band pass
circuits. The outputs are measured, and then translated to display using
some logic circuits of types. Another approach would be to use a frequency
counter, and from the values measured, follow a scaling to display the
results.

In anycase, these instruments can be fairly sophisticated internally in
comparison to how simple they look.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"John Bevan" wrote in message
...
Does anyone know how auto tuners work - as in the box that you play a note
to, and it tells you what note you are playing, and whether or not it is in
tune? I am trying to write some musical transcription software for my final
year project, and thought that modelling an autotuner's functionality may be
the best way to go about this - as opposed to the more traditional windowing
and fft-ing approach.

Thanks in advance,

John

"John Bevan" wrote ...
Does anyone know how auto tuners work - as in the box
that you play a note to, and it tells you what note you are
playing, and whether or not it is in tune? I am trying to
write some musical transcription software for my final
year project, and thought that modelling an autotuner's
functionality may be the best way to go about this - as
opposed to the more traditional windowing and fft-ing
approach.

My guess is that most modern ones are digital and use
conventional frequency-counting. Quartz crystals (for
frequency reference) cost only a fraction of a USD/GBP
in consumer production quantities.

OTOH, if you are doing this in software with what is coming
from a sound card in a computer, fft may very well be the
optimal (easiest/fastest) method. You don't have the same
paradigm as designers of small hand-held pieces of HARD-
ware.

"John Bevan" wrote ...
Does anyone know how auto tuners work - as in the box
that you play a note to, and it tells you what note you are
playing, and whether or not it is in tune? I am trying to
write some musical transcription software for my final
year project, and thought that modelling an autotuner's
functionality may be the best way to go about this - as
opposed to the more traditional windowing and fft-ing
approach.

My guess is that most modern ones are digital and use
conventional frequency-counting. Quartz crystals (for
frequency reference) cost only a fraction of a USD/GBP
in consumer production quantities.

OTOH, if you are doing this in software with what is coming
from a sound card in a computer, fft may very well be the
optimal (easiest/fastest) method. You don't have the same
paradigm as designers of small hand-held pieces of HARD-
ware.

"John Bevan" wrote ...
Does anyone know how auto tuners work - as in the box
that you play a note to, and it tells you what note you are
playing, and whether or not it is in tune? I am trying to
write some musical transcription software for my final
year project, and thought that modelling an autotuner's
functionality may be the best way to go about this - as
opposed to the more traditional windowing and fft-ing
approach.

My guess is that most modern ones are digital and use
conventional frequency-counting. Quartz crystals (for
frequency reference) cost only a fraction of a USD/GBP
in consumer production quantities.

OTOH, if you are doing this in software with what is coming
from a sound card in a computer, fft may very well be the
optimal (easiest/fastest) method. You don't have the same
paradigm as designers of small hand-held pieces of HARD-
ware.

"John Bevan" wrote ...
Does anyone know how auto tuners work - as in the box
that you play a note to, and it tells you what note you are
playing, and whether or not it is in tune? I am trying to
write some musical transcription software for my final
year project, and thought that modelling an autotuner's
functionality may be the best way to go about this - as
opposed to the more traditional windowing and fft-ing
approach.

My guess is that most modern ones are digital and use
conventional frequency-counting. Quartz crystals (for
frequency reference) cost only a fraction of a USD/GBP
in consumer production quantities.

OTOH, if you are doing this in software with what is coming
from a sound card in a computer, fft may very well be the
optimal (easiest/fastest) method. You don't have the same
paradigm as designers of small hand-held pieces of HARD-
ware.

Hi Guys,

thanks for all of your responses.

I writing software to do the transcription, and have already started coding
using an FFT, but then realised that auto-tuners seemed to be far more
accurate than any of the similar software I have found so far. Perhaps this
is simply because the tuner is held near to the instrument, so noise is less
of an issue, but I thought it may be worth checking to see if there was a
really simple solution that had never occoured to others working in the DSP
domain.

Thanks again for all your replies.

John


"Richard Crowley" wrote in message
...
"John Bevan" wrote ...
Does anyone know how auto tuners work - as in the box
that you play a note to, and it tells you what note you are
playing, and whether or not it is in tune? I am trying to
write some musical transcription software for my final
year project, and thought that modelling an autotuner's
functionality may be the best way to go about this - as
opposed to the more traditional windowing and fft-ing
approach.

My guess is that most modern ones are digital and use
conventional frequency-counting. Quartz crystals (for
frequency reference) cost only a fraction of a USD/GBP
in consumer production quantities.

OTOH, if you are doing this in software with what is coming
from a sound card in a computer, fft may very well be the
optimal (easiest/fastest) method. You don't have the same
paradigm as designers of small hand-held pieces of HARD-
ware.

Hi Guys,

thanks for all of your responses.

I writing software to do the transcription, and have already started coding
using an FFT, but then realised that auto-tuners seemed to be far more
accurate than any of the similar software I have found so far. Perhaps this
is simply because the tuner is held near to the instrument, so noise is less
of an issue, but I thought it may be worth checking to see if there was a
really simple solution that had never occoured to others working in the DSP
domain.

Thanks again for all your replies.

John


"Richard Crowley" wrote in message
...
"John Bevan" wrote ...
Does anyone know how auto tuners work - as in the box
that you play a note to, and it tells you what note you are
playing, and whether or not it is in tune? I am trying to
write some musical transcription software for my final
year project, and thought that modelling an autotuner's
functionality may be the best way to go about this - as
opposed to the more traditional windowing and fft-ing
approach.

My guess is that most modern ones are digital and use
conventional frequency-counting. Quartz crystals (for
frequency reference) cost only a fraction of a USD/GBP
in consumer production quantities.

OTOH, if you are doing this in software with what is coming
from a sound card in a computer, fft may very well be the
optimal (easiest/fastest) method. You don't have the same
paradigm as designers of small hand-held pieces of HARD-
ware.

Hi Guys,

thanks for all of your responses.

I writing software to do the transcription, and have already started coding
using an FFT, but then realised that auto-tuners seemed to be far more
accurate than any of the similar software I have found so far. Perhaps this
is simply because the tuner is held near to the instrument, so noise is less
of an issue, but I thought it may be worth checking to see if there was a
really simple solution that had never occoured to others working in the DSP
domain.

Thanks again for all your replies.

John


"Richard Crowley" wrote in message
...
"John Bevan" wrote ...
Does anyone know how auto tuners work - as in the box
that you play a note to, and it tells you what note you are
playing, and whether or not it is in tune? I am trying to
write some musical transcription software for my final
year project, and thought that modelling an autotuner's
functionality may be the best way to go about this - as
opposed to the more traditional windowing and fft-ing
approach.

My guess is that most modern ones are digital and use
conventional frequency-counting. Quartz crystals (for
frequency reference) cost only a fraction of a USD/GBP
in consumer production quantities.

OTOH, if you are doing this in software with what is coming
from a sound card in a computer, fft may very well be the
optimal (easiest/fastest) method. You don't have the same
paradigm as designers of small hand-held pieces of HARD-
ware.

Hi Guys,

thanks for all of your responses.

I writing software to do the transcription, and have already started coding
using an FFT, but then realised that auto-tuners seemed to be far more
accurate than any of the similar software I have found so far. Perhaps this
is simply because the tuner is held near to the instrument, so noise is less
of an issue, but I thought it may be worth checking to see if there was a
really simple solution that had never occoured to others working in the DSP
domain.

Thanks again for all your replies.

John


"Richard Crowley" wrote in message
...
"John Bevan" wrote ...
Does anyone know how auto tuners work - as in the box
that you play a note to, and it tells you what note you are
playing, and whether or not it is in tune? I am trying to
write some musical transcription software for my final
year project, and thought that modelling an autotuner's
functionality may be the best way to go about this - as
opposed to the more traditional windowing and fft-ing
approach.

My guess is that most modern ones are digital and use
conventional frequency-counting. Quartz crystals (for
frequency reference) cost only a fraction of a USD/GBP
in consumer production quantities.

OTOH, if you are doing this in software with what is coming
from a sound card in a computer, fft may very well be the
optimal (easiest/fastest) method. You don't have the same
paradigm as designers of small hand-held pieces of HARD-
ware.