diff --git a/csdr.py b/csdr.py
index 5fd2a20..6e78adb 100755
--- a/csdr.py
+++ b/csdr.py
@@ -110,12 +110,12 @@ class dsp(object):
                 chain += " -i - -o - -u {unvoiced_quality} -g 10 | "
             # digiham modes
             else:
-                chain += "rrc_filter | csdr limit_ff | csdr convert_f_s16 | gfsk_demodulator | "
+                chain += "rrc_filter | csdr convert_f_s16 | gfsk_demodulator | "
                 if which == "dmr":
                     chain += "dmr_decoder --fifo {meta_pipe} | mbe_synthesizer -u {unvoiced_quality} | "
                 elif which == "ysf":
                     chain += "ysf_decoder --fifo {meta_pipe} | mbe_synthesizer -y -u {unvoiced_quality} | "
-            chain += "digitalvoice_filter | sox -t raw -r 8000 -e signed-integer -b 16 -c 1 --buffer 32 - -t raw -r {output_rate} -e signed-integer -b 16 -c 1 - "
+            chain += "digitalvoice_filter | sox -V -v 0.95 -t raw -r 8000 -e signed-integer -b 16 -c 1 --buffer 32 - -t raw -r {output_rate} -e signed-integer -b 16 -c 1 - "
         elif which == "am":
             chain += "csdr amdemod_cf | csdr fastdcblock_ff | "
             chain += last_decimation_block