![]() Bypassing AirPlay had no discernible drop off, in other words playing files through iTunes does not cause there to be a change in the frequency response.Īs far as I am aware this is the first time anyone has tried to analyse what AirPlay is doing to the audio. To be sure the change in frequency spectrum wasn't caused by iTunes itself I did the same test but had iTunes play directly to SoundFlower (bypassing AirPlay), and recorded via Piezo. The difference graph clearly shows that the recorded Pink Noise is already dropping off around 5kHz and has well and truly dropped off by 15kHz. To compare this more directly, I exported the data and graphed the difference between the two graphs: On the left is the frequency spectrum of the original Pink Noise 44kHz file, on the right is the frequency spectrum of the recorded Pink Noise through AirPlay: The frequency spectrum of the original Pink Noise file and recorded file are analysed using Audacity.Rogue Amoeba's Piezo is used to record audio from SoundFlower to an AAC file. Bitperfect itunes driver#Airfoil is set up to output sound to SoundFlower which is a dummy audio driver.Rogue Amoeba's Airfoil software is set up as an AirPlay receiver.The Pink Noise file is played through iTunes using AirPlay.I converted the FLAC to 44kHz ALAC using XLD.I used a 48kHz Pink Noise FLAC file from.The plan was to use my Mac as both the AirPlay transmitter and receiver and to use Rogue Amoeba's software to capture and record the AirPlay audio. The plan is to bypass the Yamaha R-N500 entirely and see if the AirPlay changes could be measured entirely on the Mac. ![]() I thought I'd see if it was possible to measure the difference. To my ear AirPlay sounds warmer with less detail. ![]() AirPlay sounds quite different through my Yamaha R-N500 compared to other inputs. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |