diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..305f8ef
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+__pycache__
+*.a
+*.o
+*.so
diff --git a/.gitmodules b/.gitmodules
index f5ef638..bbdd173 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,4 @@
 [submodule "lib/libfec"]
 	path = lib/libfec
 	url = https://github.com/quiet/libfec.git
+	ignore = untracked
diff --git a/app/.gitignore b/app/.gitignore
new file mode 100644
index 0000000..8a17df1
--- /dev/null
+++ b/app/.gitignore
@@ -0,0 +1,7 @@
+/pocket_acq/pocket_acq
+/pocket_conf/pocket_conf
+/pocket_dump/pocket_dump
+/pocket_scan/pocket_scan
+/pocket_snap/pocket_snap
+/pocket_trk/fftw_wisdom
+/pocket_trk/pocket_trk
diff --git a/bin/.gitignore b/bin/.gitignore
new file mode 100644
index 0000000..a77b87a
--- /dev/null
+++ b/bin/.gitignore
@@ -0,0 +1,7 @@
+/fftw_wisdom
+/pocket_acq
+/pocket_conf
+/pocket_dump
+/pocket_scan
+/pocket_snap
+/pocket_trk
diff --git a/lib/LDPC-codes b/lib/LDPC-codes
new file mode 160000
index 0000000..74a8e28
--- /dev/null
+++ b/lib/LDPC-codes
@@ -0,0 +1 @@
+Subproject commit 74a8e283be8259dbff7a6bab38ad7e9327825cbf
diff --git a/lib/libfec b/lib/libfec
new file mode 160000
index 0000000..9750ca0
--- /dev/null
+++ b/lib/libfec
@@ -0,0 +1 @@
+Subproject commit 9750ca0a6d0a786b506e44692776b541f90daa91
diff --git a/python/pocket_acq.py b/python/pocket_acq.py
old mode 100644
new mode 100755
diff --git a/python/pocket_plot.py b/python/pocket_plot.py
old mode 100644
new mode 100755
diff --git a/python/pocket_psd.py b/python/pocket_psd.py
old mode 100644
new mode 100755
diff --git a/python/pocket_snap.py b/python/pocket_snap.py
old mode 100644
new mode 100755
diff --git a/python/pocket_trk.py b/python/pocket_trk.py
old mode 100644
new mode 100755
diff --git a/python/sdr_func.py b/python/sdr_func.py
index d58ba27..4ea5d48 100644
--- a/python/sdr_func.py
+++ b/python/sdr_func.py
@@ -68,8 +68,8 @@
 #      data     Digitized IF data as complex64 ndarray (length == 0: read error)
 #
 def read_data(file, fs, IQ, T, toff=0.0):
-    off = int(fs * toff * IQ)
-    cnt = int(fs * T * IQ) if T > 0.0 else -1 # all if T=0.0
+    off = int(fs * toff * IQ) & ~7
+    cnt = (int(fs * T * IQ) & ~1) if T > 0.0 else -1 # all if T=0.0
     
     f = open(file, 'rb')
     f.seek(off, os.SEEK_SET)