Hi Sanworks Team,
We are an auditory lab trying to build a new setup with your HiFi Module HD. We noticed that the voltage output from them decrease significantly at higher frequencies (above 42kHz), making it unable to play sounds loud enough at higher frequency range for the mice (e.g. 60 kHz). We noticed that it is within the specs of the HiFiBerry DAC2 HD (https://www.hifiberry.com/docs/data-sheets/datasheet-dac-hd/), which states a -3dB frequency range of 10Hz-40kHz. This is different from what was shown in the article introducing the HiFi Module (https://sanworks.io/news/viewArticle.php?articleID=HiFi01). Interestingly, the HiFiBerry DAC2 Pro for the HiFi Module SD has a larger range (10Hz-70kHz; https://www.hifiberry.com/docs/data-sheets/datasheet-dac2-pro/).
Did you experience the same discrepancy? If so, we were wondering if we can replace the sound card from our HD module to achieve this higher frequency range (despite potentially lower SNR).
In any case, it would be good to note this in the description page of these two HiFi Module versions. Frequencies of up to 70-80 kHz are within hearing of good hearing mouse strains.
