diff --git a/sys/dev/sound/usb/uaudio.c b/sys/dev/sound/usb/uaudio.c
index 6c798cc0e09..9d98a78bccb 100644
--- a/sys/dev/sound/usb/uaudio.c
+++ b/sys/dev/sound/usb/uaudio.c
@@ -1659,21 +1659,10 @@ uaudio_chan_fill_info_sub(struct uaudio_softc *sc, struct usb_device *udev,
 		} else if (audio_rev >= UAUDIO_VERSION_20) {
 
 			uint32_t dwFormat;
-			uint8_t bSubslotSize;
 
 			dwFormat = UGETDW(asid.v2->bmFormats);
 			bChannels = asid.v2->bNrChannels;
-			bBitResolution = asf1d.v2->bBitResolution;
-			bSubslotSize = asf1d.v2->bSubslotSize;
-
-			/* Map 4-byte aligned 24-bit samples into 32-bit */
-			if (bBitResolution == 24 && bSubslotSize == 4)
-				bBitResolution = 32;
-
-			if (bBitResolution != (bSubslotSize * 8)) {
-				DPRINTF("Invalid bSubslotSize\n");
-				goto next_ep;
-			}
+			bBitResolution = asf1d.v2->bSubslotSize * 8;
 
 			if ((bChannels != channels) ||
 			    (bBitResolution != bit_resolution)) {
@@ -1720,7 +1709,7 @@ uaudio_chan_fill_info_sub(struct uaudio_softc *sc, struct usb_device *udev,
 
 			wFormat = UGETW(asid.v1->wFormatTag);
 			bChannels = UAUDIO_MAX_CHAN(asf1d.v1->bNrChannels);
-			bBitResolution = asf1d.v1->bBitResolution;
+			bBitResolution = asf1d.v1->bSubFrameSize * 8;
 
 			if (asf1d.v1->bSamFreqType == 0) {
 				DPRINTFN(16, "Sample rate: %d-%dHz\n",