TuneCore and pitchforkmedia.com. TuneCore's first customer was Frank Black, lead singer of the Pixies. In 2008, TuneCore was utilized by Nine Inch Nails to deliver the music from their album, "Ghosts I–IV" to the Amazon MP3 store. In December 2006, music instrument and equipment retailer Guitar Center bought a stake in TuneCore, giving the company access to the music retailer's customers. In the United States, TuneCore represents about 10 percent of the 20 million songs on iTunes, and it accounts for almost 4 percent of all digital sales. TuneCore reportedly fired Jeff Price, a co-founder and then-CEO, after the company faced
Tidal volume Tidal volume Tidal volume (symbol V or TV) is the lung volume representing the normal volume of air displaced between normal inhalation and exhalation when extra effort is not applied. In a healthy, young human adult, tidal volume is approximately 500 mL per inspiration or 7 mL/kg of body mass. Tidal volume plays a significant role during mechanical ventilation to ensure adequate ventilation without causing trauma to the lungs. Tidal volume is measured in milliliters and ventilation volumes are estimated based on a patient's ideal body mass. Measurement of tidal volume can be affected (usually overestimated) by leaks in the