Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Icon iKeyboard 4 - 37-key MIDI controller incl Cubase LE
Product description: The Icon iKeyboard 4 combines a three-octave piano keyboard with a single channel DAW controller in a rugged metal enclosure. Unlike many keyboard controllers with small plastic keys, this piano keyboard was specially designed by Icon with great attention to detail. The full sized keys are semi-weighted to provide realistic piano action. Touch strips provided for pitch bend and modulation. The iKeyboard 4 has all the controls you need right at your fingertips. The controller section features a touch fader with LED feedback to control and automate levels and other parameters, plus mute, solo, and rec buttons, with track and bank selection. A full transport is provided for playback, recording, looping, and changing automation modes. The large rotary encoder with LED ring can be used for panning, setting send levels, controlling plugin parameters, and more. The iKeyboard 4 comes bundled with Cubase LE and includes factory presets for most popular DAWs including Cubase, Nuendo, Logic Pro, Pro Tools, Ableton Live, Amplitude and Studio One. Every control on the iKeyboard 4 can be custom-mapped to any MIDI application using the included iMap software. The iKeyboard 4 uses Mackie Control and HUI protocols for presets and automatic mapping, and can be configured for general MIDI values as well. The iKeyboard 4 has connections for expression and sustain pedals, MIDI out, USB, and power.
Product feature: 37-note keyboard controller with single-channel DAW controller, Full size, semi-weighted keys with realistic piano action and selectable velocity curves, Presets built-in for Pro Tools, Cubase, Nuendo, Amplitude, Logic Pro, and Able ton Live, Includes iMap software for quick and easy MIDI mapping, Class-compliant with Windows XP, Vista (32-bit), Windows 7 (32-bit & 64-bit), Windows 8 (32-bit & 64-bit) and OS X (10.4 and higher)
Product brand: Icon Pro Audio
Target attributes: Key Count
Answer: attribute: key count
value: 37-note
source: product feature
attribute: key count
value: 37-key
source: product title