Want to give a short feedback for other user waiting for a solution.
Thanks to Daniel the problem is solved now by the following patch:
diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index 379baad..b05111d 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -255,6 +255,13 @@ static int set_sample_rate_v2(struct snd_usb_audio
*chip, int iface,
int err, crate;
int clock = snd_usb_clock_find_source(chip, fmt->clock);
+ /*
+ * Fractal Audio Systems AXE-FX II does not respond to sample rate
+ * set requests. The only valid rate is 48000.
+ */
+ if (chip->usb_id == USB_ID(0x2466, 0x8003) && rate == 48000)
+ return 0;
+
if (clock < 0)
return clock;
diff --git a/sound/usb/format.c b/sound/usb/format.c
index ddfef57..7a9e82a 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -279,6 +279,20 @@ static int parse_audio_format_rates_v2(struct
snd_usb_audio *chip,
int nr_triplets, data_size, ret = 0;
int clock = snd_usb_clock_find_source(chip, fp->clock);
+ /*
+ * Fractal Audio Systems AXE-FX II does not respond to sample rate
+ * query requests. The only valid rate is 48000.
+ */
+ if (chip->usb_id == USB_ID(0x2466, 0x8003)) {
+ fp->nr_rates = 1;
+ fp->rate_min = 48000;
+ fp->rate_max = 48000;
+ fp->rates = SNDRV_PCM_RATE_48000;
+ fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
+ fp->rate_table[0] = 48000;
+ return 0;
+ }
+
if (clock < 0) {
snd_printk(KERN_ERR "%s(): unable to find clock source (clock
%d)\n",
__func__, clock);
In addition to the previously posted patch it was necessary to modify
clock.c also, because the Axe-FX II currently neither responds to get
sample rate requests nor set sample rate requests.
Many thanks again to Daniel.
Best regards
Joachim
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