[root@gateway root]# arecord -v > testfile
Recording WAVE 'stdout' : Unsigned 8 bit, Rate 8000 Hz, Mono
Plug PCM: Route conversion PCM (sformat=S32_LE)
Transformation table:
0 <- 0*0.0833333 + 1*0.0833333 + 2*0.0833333 + 3*0.0833333 + 4*0.0833333 + 5*0.0833333 + 6*0.0833333 + 7*0.0833333 + 8*0.0833333 + 9*0.0833333 + 10*0.0833333 + 11*0.0833333
Its setup is:
stream       : CAPTURE
access       : RW_INTERLEAVED
format       : U8
subformat    : STD
channels     : 1
rate         : 8000
exact rate   : 8000 (8000/1)
msbits       : 8
buffer_size  : 4000
period_size  : 1000
period_time  : 125000
tick_time    : 10000
tstamp_mode  : NONE
period_step  : 1
sleep_min    : 0
avail_min    : 1000
xfer_align   : 1000
start_threshold  : 1
stop_threshold   : 4000
silence_threshold: 0
silence_size : 0
boundary     : 2097152000
Slave: Hardware PCM card 0 'M Audio Delta 1010LT' device 0 subdevice 0

Its setup is:
stream       : CAPTURE
access       : MMAP_INTERLEAVED
format       : S32_LE
subformat    : STD
channels     : 12
rate         : 8000
exact rate   : 8000 (8000/1)
msbits       : 24
buffer_size  : 4000
period_size  : 1000
period_time  : 125000
tick_time    : 10000
tstamp_mode  : NONE
period_step  : 1
sleep_min    : 0
avail_min    : 1000
xfer_align   : 1000
start_threshold  : 1
stop_threshold   : 4000
silence_threshold: 0
silence_size : 0
boundary     : 2097152000
Aborted by signal Interrupt...