What I2S DAC uses left justified format?

[xaled]

pi@moode:~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: GenericLJ [GenericLJ], device 0: bcm2835-i2s-dit-hifi dit-hifi-0 []
 Subdevices: 1/1
 Subdevice #0: subdevice #0
pi@moode:~ $ speaker-test -h

speaker-test 1.1.3

Usage: speaker-test [OPTION]...
-h,--help       help
-D,--device     playback device
-r,--rate       stream rate in Hz
-c,--channels   count of channels in stream
-f,--frequency  sine wave frequency in Hz
-F,--format     sample format
-b,--buffer     ring buffer size in us
-p,--period     period size in us
-P,--nperiods   number of periods
-t,--test       pink=use pink noise, sine=use sine wave, wav=WAV file
-l,--nloops     specify number of loops to test, 0 = infinite
-s,--speaker    single speaker test. Values 1=Left, 2=right, etc
-w,--wavfile    Use the given WAV file as a test sound
-W,--wavdir     Specify the directory containing WAV files
-m,--chmap      Specify the channel map to override
-X,--force-frequency    force frequencies outside the 30-8000hz range
-S,--scale      Scale of generated test tones in percent (default=80)

Recognized sample formats are: S8 S16_LE S16_BE FLOAT_LE S32_LE S32_BE