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Specs from the boxes
Korg AW-2K

Korg Micro Tuner.  This sleek tuner clamps to your instrument via your choice of clamps.  It works well on trumpet, trombone, and French horn.  Tuba players might like it as well, but it's worth testing it out first, due to the close proximity of the leadpipe clamping position to your eyes. Runs on a small watch battery (included), and also includes a carrying case. 
  • Clip-on chromatic tuners that attach directly to a wind instrument or string instrument for cable-free tuning
  • AW2 includes two clips (large and small) to accommodate a variety of orchestral instruments
  • Double ball-joint allows multi-angle positioning with far greater mobility for the display section
  • Internal backlight ensures excellent visibility even on a dimly lit stage
  • Energy-saving Auto mode automatically switches to the low-power Soft mode when no sound is present


The AW-1 was a top--selling model that has been popular with musicians of wide-ranging genres for its superb functionality and convenience. The new AW-2 Chromatic Tuner enhances this basic concept by adding the flexibility of an adjustable angle for the display section, enhanced visibility from the built-in backlight, and improved fit to your instrument, allowing the performer to tune in a natural position. The new AW-2G adds a clip that's optimized for a guitar. With the AW-2/AW-2G, you'll be ready for stress-free tuning in any situations. The tuner display section and the clip section are connected by a double ball joint that provides a broader range of left/right/up/down movement, dramatically increasing the range of adjustment. Even in cases where it was difficult to view the AW1, the AW2 makes it easy to adjust the display section for easy viewing, allowing you to tune in a natural position.


Korg CA-30 Tuner

Chromatic auto tuner for all types of instruments, adjustable calibration range (410-480Hz), built in reference tone (12 notes/A4, Bb4 switchable), auto power off and memory backup, longer operation time on batteries (two batteries included).  From korg.com:

The new CA-30 joins the best-selling CA series of tuners. With even more features, like a pitch reference tone and marks for pure major thirds and minor thirds, the CA-30 packs basic functionality and convenient tuning functions into ultra-compact bodies.

  • Compact Chromatic Tuner, ideal for brass band or orchestra
  • Wide range of pitch detection covers C1-C8
  • High-precision LCD needle-type meter for stable tuning
  • Sound Out produces a reference tone from the internal speaker
  • Calibration Function supports a variety of concert pitches
  • Auto Power Off function conserves battery life
  • Memory Backup function
  • Approximately 100 hours of continuous use

Wide Range of Pitch Detection
This compact chromatic tuner supports a broad range of C1 (32.70 Hz)-C8 (4186.01 Hz), allowing speedy and high-precision tuning of wind, string, keyboard, and other instruments. This tuner is ideal for tuning even low-register notes containing numerous overtones that are often difficult to tune. A high-sensitivity mic is built-in, allowing easy and accurate tuning of acoustic instruments such as ukuleles. A separately sold CM-100 contact mic can also be used to send the vibrations directly to the tuner for even more accurate tuning.

Ultra-compact body with a "Tilt Slit"
Although the CA-30 is small, thin, and light, don?t let its pocket-sized body fool you. The CA-30 packs the functionality needed for tuning a wide range of instruments. From studio to stage, tuning is easy and convenient. The back of the unit includes a unique arc-shaped "tilt slit" that lets you insert a plastic card for use as a handy stand.

High-precision LCD Meter
The meter section uses a LCD needle, combining the accuracy of an LCD with the easy visibility of a needle, and providing a stable display. Additional visual feedback is provided by LEDs that indicate pitch deviation.

Sound Out
In addition to visual tuning via meter, the CA-30 can play reference pitches from its internal speaker (Sound Out) for tuning by ear. Each press of the Sound switch will cycle through the A4-Bb4 notes commonly used for tuning wind instruments. Or you can hold down the Sound switch to change the cycle to the semitone intervals from C4 through C5 (one octave), allowing reference pitches for any instrument to be sounded quickly.

Adjustable Calibration
The Calibration function (410-480 Hz) supports a wide range of standard pitches, and can be adjusted in 1 Hz steps for accurate and flexible tuning to any song or key. Thanks to the Memory Backup function, the Calibration and reference pitch are remembered even when the power is turned off. (However, these settings will be initialized when the batteries are replaced.)

Auto Power Off Function
The power will turn off automatically, if the unit is left powered-on for 20 minutes without performing any operation, avoiding unnecessary battery consumption.

Approximately 100 hours of Continuous Use
Low-power consumption design allows an amazing 100 hours (approximate) of continuous battery life (A4 continuous input, meter mode, zinc-carbon batteries).

* Even if the pitch is within the detection range, detection may not be possible for instrumental sounds that contain a large number of overtones or have a rapid decay.



Chromatic tuner, accurate to one cent, quartz tuning, digital processing, 9V battery included, excellent low range accuracy, adjustable pitch $99
Qwik Tune QT-2

In & out jacks, meter & LED lights, automatic note selection, pitch calibration 436-445Hz, unsurpassed accuracy (really?), coin slot on back of tuner for tilt back stand $25
Qwik Tune QT-8

In & out jacks, built-in mic, fast and accurate LCD meter, superior performance for acoustic, electric, and bass guitars, #1 seller (according to Qwik Tune) $12


Specs from the boxes
Korg MA-30

Pocket Size, digital display, batteries included, 0-7 beats, 40-208 bpm, A 440 pitch.  From korg.com:

The MA-30 is the latest offering from Korg?s innovative line of metronomes, with new features like volume control and sophisticated rhythms such as triplets and quadruplets with inner beats omitted.


  • Highly visual liquid crystal pendulum
  • 13 different rhythms are built-in so you can practice to more than a click track
  • Rhythms include duplets, triplets, triplets with inner beats omitted, quadruplets, and quadruplets with inner beats omitted
  • Twelve reference pitches C4 -B4 for you to tune to
  • Adjustable calibration (438-445 Hz)
  • Adjustable volume
  • Tempo adjusts from 40-208 bpm
  • Tap function for setting the tempo
  • Earphone jack so only you can hear it
  • Memory backup function
  • Approximately 250 hours of continuous use
  • Dimensions: 4.09(W) x 2.52(D)x 0.59 (H) in.
  • Weight .17 lbs. (including batteries)


Qwik Time QT-5

2/4, 3/4, or 4/4 rhythms, accent beat, bouncing ball visual teaches rhythm, over 200 speeds - 40 to 250, louder speaker and superior accuracy, very small size, like a thick credit card $11
Qwik Time QT-7

2/4, 3/4, or 4/4 rhythms, accent beat, bouncing ball visual teaches rhythm, over 200 speeds - 40 to 250, louder speaker and superior accuracy, true "wood block" click, earphone jack $18