diff --git a/documentation/asciidoc/accessories/iqaudio/dac_pro.adoc b/documentation/asciidoc/accessories/iqaudio/dac_pro.adoc index 790fa3938..cab1788b8 100644 --- a/documentation/asciidoc/accessories/iqaudio/dac_pro.adoc +++ b/documentation/asciidoc/accessories/iqaudio/dac_pro.adoc @@ -1,23 +1,21 @@ === Raspberry Pi DAC Pro -Our Raspberry Pi DAC Pro HAT is our highest-fidelity DAC (Digital to Analogue Converter). +The Raspberry Pi DAC Pro HAT is our highest-fidelity digital to analogue converter (DAC). image::images/DAC_Pro_Board_Diagram.jpg[width="80%"] -With the Texas Instruments PCM5242, the DAC Pro provides outstanding Signal to Noise Ratio -and supports Balanced/Differential out in parallel to Phono/RCA line level output. It also includes a -dedicated headphone amplifier. The DAC Pro is powered by Raspberry Pi through the GPIO header. +With the Texas Instruments PCM5242, the DAC Pro provides outstanding signal-to-noise ratio (SNR) +and supports balanced/differential output in parallel to phono/RCA line-level output. It also includes a +dedicated headphone amplifier. The DAC Pro is powered by a Raspberry Pi through the GPIO header. -A careful selection of components and the layout of tracks have been at the forefront of our design in order to ensure noise immunity and the best playback of audio. - -As part of the DAC Pro, two 3 pin headers (P7/P9) are exposed above the Raspberry Pi's USB and Ethernet ports for use by the optional XLR board that allows differential/balanced output. +As part of the DAC Pro, two three-pin headers (P7/P9) are exposed above the Raspberry Pi's USB and Ethernet ports for use by the optional XLR board, allowing differential/balanced output. ==== Pinouts [cols="1,12"] |=== -| *P1* | Analogue out (0..2V RMS), carries GPIO27, MUTE signal (headphone detect), Left and Right -Audio and Left and Right Ground. -| *P6* | Headphone socket signals (pin1: LEFT, 2:GROUND, 3: RIGHT, 4:GROUND, 5:DETECT). -| *P7/9* | Differential (0..4V RMS) output (P7:LEFT, P9: RIGHT). +| *P1* | Analogue out (0-2V RMS), carries GPIO27, MUTE signal (headphone detect), left and right +audio and left and right ground. +| *P6* | Headphone socket signals (1: LEFT, 2: GROUND, 3: RIGHT, 4: GROUND, 5: DETECT). +| *P7/9* | Differential (0-4V RMS) output (P7: LEFT, P9: RIGHT). | *P10* | Alternative 5V input, powering Raspberry Pi in parallel. |===