![]() ![]() Just for fun, let's see how much of this minimal distortion is from the AirPort Express DAC, and how much is inherent in the undithered 16-bit signal: (CBS CD-1 track 18, R&S UPL.)Īnalog output harmonic content, undithered 997 Hz sine wave at -60 dBFS. Are we sure there aren't some Nuvistors or a 12AX7 in there?Īnalog output harmonic content, undithered 997 Hz sine wave at -40 dBFS. Perfect, it's got even less distortion at -20 dBFS where it counts. Let's play tracks at low levels and see what happens:Īnalog output harmonic content, undithered 997 Hz sine wave at -20 dBFS. Most people have to buy tube amps to get this. (CBS CD-1 track 1, R&S UPL.)Īhhh, almost entirely musical second harmonic distortion. (CBS CD-1 track 1, R&S UPL.)Īnalog output harmonic content, undithered 1kHz sine wave at 0 dBFS. (CBS CD-1 track 11, R&S UPL.)įFT while playing 1 kHz at 0 dBFS. Here's the frequency response via the TOSLINK optical digital output:ĭigital output frequency response. Let's load it with 300Ω, as if a pair of Hi-Fi headphones were plugged in directly, and see what happens:Īnalog output at 0 dBFS, 300 Ω load. It's got about the same high frequency rolloff as the special digital filter mode of the Sony SCD-XA777ES, and it's got perfect response to infrasonics. When they don't lie on top of each other, it's due to channel imbalance. The traces are color coded for the Left Channel and for the Right Channel. Signals are from the CBS CD-1 test CD as transferred into iTunes as an ALC (Apple Lossless) file, and played via iTunes from a Mac Pro in iTunes 11.1.5 in OS 10.9.4 over a Wi-Fi connection from a much larger home network. Unless otherwise noted, all are RMS as measured from the analog output loaded with 200 kΩ at 0 dBFS at 1 kHz. These are measured with a $50,000 Rohde & Schwarz UPL laboratory analyzer as calibrated by Rohde & Schwarz. Output Spectra & Square Waves Digital Output Jitter Output Levels Output Impedance Noise & DC Offset The power cord is so nice that some rich folks in Leichtenstein buy these just for the cords for other equipment, and throw away the AirPort Express!Ībout $35 used if you know How to Win at eBay in February 2023. Stereo 3.5mm analog at 2 V RMS, Mini-TOSLINK optical digital SPDIF (same jack).Īctual consumption at 120 VAC: 2.3 watts. Use a Mini TOSLINK cable to plug into other TOSLINK SPDIF inputs. The TOSLINK output is the same connector as the 3.5mm analog connector. ![]() The AirPort Express has its own great DAC, but if you prefer to use another, no problem. Use a Mini TOSLINK cable to connect directly to the optical SPDIF digital inputs of a DAC or stereo receiver. Since you can control the volume from your device or Mac, you can skip the preamp for even better fidelity just plug it directly into your power amplifier. Use a 3.5mm to RCA cord to connect to any stereo system or power amp or preamp, or many other powered speakers. Use a 3.5mm cord to connect to many powered speakers. Simply plug the AirPort express into your HiFi, stereo, power-amplifier, home music system or powered speakers, and it will play from your iOS device or your Mac. It's easy to configure a slew of them to sit in different rooms of your home, and play to them from your devices. ![]() With node acp (in terminal): acp -host with the admin password of the AirPort.This Apple AirPort Express can be used as a high-perfomance DAC to play-out from a Mac or iOS device over AirPlay, WiFi, or a wired Ethernet connection. Node acp ( npm install -global node-acp) by Samuel Elliott ( samuelthomas2774)ĪirPyrt ( git clone & python airpyrt-tools/setup.py install -user) by Vince Cali ( x56) Also I haven't tested this, I'm just going off a source (also these utilities are kind of old so I don't know what to expect). This should enable SSH and then you could login with root and the admin password of the AirPort. I haven't seen any tutorials for the AirPort on this subreddit which is why I'm making this. ![]()
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