1 files changed, 2 insertions, 2 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 2b24496ddec7..f853b627cf43 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -1783,7 +1783,7 @@ static int check_hw_params_convention(struct snd_usb_substream *subs)
                         if (rates[f->format] && rates[f->format] != f->rates)
                                 goto __out;
                 }
-                channels[f->format] |= (1 << f->channels);
+                channels[f->format] |= 1 << (f->channels - 1);
                 rates[f->format] |= f->rates;
                 /* needs knot? */
                 if (f->rates & SNDRV_PCM_RATE_KNOT)
@@ -1810,7 +1810,7 @@ static int check_hw_params_convention(struct snd_usb_substream *subs)
                         continue;
                 for (i = 0; i < 32; i++) {
                         if (f->rates & (1 << i))
-                                channels[i] |= (1 << f->channels);
+                                channels[i] |= 1 << (f->channels - 1);
                 }
         }
         cmaster = 0;