Assembled “by engineers, for engineers” after a survey of the needs of a broad cross section of working audio pros, the disc features 71 tracks of test signals ranging from level calibration tones, noise signals, third octave tones, polarity and digital meter calibration pulses, bandpassed noise and swept sine waves. Additional tracks include dry recorded kick and snare drums, acoustic guitar and piano along with spoken word and a cappella male and female vocals. A data area on the disc features BPM charts, Excel based calculators and other bonus material. The CD booklet includes tutorial information on using the test disc and is a must have resource for any student or seasoned pro. Student AES sections are encouraged to contact AES Nashville at studentCDsales@aesnashville.org to inquire about the special student rate.