Hi-res files and hi-res output are different
MP95 can decode your hi-res FLAC, ALAC, WAV and AIFF files without converting them first. Preserving the file’s sample rate at the output also depends on the connected device: use a compatible USB DAC, enable sample-rate matching, and check the Output line. For bit-perfect playback, bypass sound processing and turn ReplayGain off.
Read about bit-perfect playback and supported audio formats.
Per-track rate
With Match output sample rate on, MP95 asks iOS for each file’s rate. The DAC follows: 44.1 for a CD rip, 96 or 192 for hi-res. A DAC plugged in mid-song is picked up without stopping. How it works.
The Output line
Settings → Sound → Hi-Fi shows the live state: 96 kHz · bit-perfect when nothing is processing and the DAC is at the file’s rate, → 48 kHz · resampled when the device refused, or the list of stages that are shaping the sound.
What you plug in
USB-C iPhones take USB-C DACs and dongles directly. Lightning iPhones need a Lightning DAC or Apple’s camera adapter. Using a USB DAC with iPhone.
Frequently asked questions
Can a hi-res music player make Bluetooth lossless?
No. Playing a hi-res file does not remove Bluetooth codec limitations. Use a compatible wired USB DAC when you want the output sample rate to follow the file.
Does the iPhone support 24-bit/192 kHz?
Through a USB DAC, yes: iOS runs the output at the rate the DAC accepts. The built-in speaker and Bluetooth do not.