PARM_BYTE
{PARM_BYTE, 0, 0xff, parm_offset(chorus), 0}, /* chorus */
{PARM_BYTE, 0, 0xff, parm_offset(reverb), 0}, /* reverb */
{PARM_BYTE, 0, 0xff, parm_offset(cutoff), SNDRV_EMUX_UPDATE_VOLUME}, /* cutoff */
{PARM_BYTE, 0, 15, parm_offset(filterQ), SNDRV_EMUX_UPDATE_Q}, /* resonance */
{PARM_BYTE, 0, 0xff, -1, SNDRV_EMUX_UPDATE_VOLUME}, /* initial attenuation */