diff --git a/src/lasp/device/lasp_streammgr.cpp b/src/lasp/device/lasp_streammgr.cpp
index 1d07dad..e79d9ba 100644
--- a/src/lasp/device/lasp_streammgr.cpp
+++ b/src/lasp/device/lasp_streammgr.cpp
@@ -11,6 +11,7 @@ using std::cerr;
 using std::endl;
 using rte = std::runtime_error;
 
+
 InDataHandler::InDataHandler(StreamMgr &mgr) : _mgr(mgr) { DEBUGTRACE_ENTER; }
 void InDataHandler::start() {
   DEBUGTRACE_ENTER;
@@ -59,6 +60,7 @@ void StreamMgr::checkRightThread() const {
 void StreamMgr::rescanDAQDevices(bool background,
                                  std::function<void()> callback) {
   DEBUGTRACE_ENTER;
+  auto& pool = getPool();
 
   checkRightThread();
   if (!_devices_mtx.try_lock()) {
@@ -74,7 +76,7 @@ void StreamMgr::rescanDAQDevices(bool background,
   if (!background) {
     rescanDAQDevices_impl(callback);
   } else {
-    /* pool.push_task(&StreamMgr::rescanDAQDevices_impl, this, callback); */
+    pool.push_task(&StreamMgr::rescanDAQDevices_impl, this, callback);
   }
 }
 void StreamMgr::rescanDAQDevices_impl(std::function<void()> callback) {
diff --git a/src/lasp/device/lasp_streammgr.h b/src/lasp/device/lasp_streammgr.h
index cc16cb2..ce155a1 100644
--- a/src/lasp/device/lasp_streammgr.h
+++ b/src/lasp/device/lasp_streammgr.h
@@ -13,56 +13,56 @@ class StreamMgr;
 
 class InDataHandler {
 
-  protected:
-    StreamMgr &_mgr;
+protected:
+  StreamMgr &_mgr;
 #if LASP_DEBUG == 1
-    std::atomic<bool> stopCalled{false};
+  std::atomic<bool> stopCalled{false};
 #endif
 
-  public:
-    virtual ~InDataHandler();
+public:
+  virtual ~InDataHandler();
 
-    /**
-     * @brief When constructed, the handler is added to the stream manager, which
-     * will call the handlers's inCallback() until stop() is called.
-     *
-     * @param mgr Stream manager.
-     */
-    InDataHandler(StreamMgr &mgr);
+  /**
+   * @brief When constructed, the handler is added to the stream manager, which
+   * will call the handlers's inCallback() until stop() is called.
+   *
+   * @param mgr Stream manager.
+   */
+  InDataHandler(StreamMgr &mgr);
 
-    /**
-     * @brief This function is called when input data from a DAQ is available.
-     *
-     * @param daqdata Input data from DAQ
-     *
-     * @return true if no error. False to stop the stream from running.
-     */
-    virtual bool inCallback(const DaqData &daqdata) = 0;
+  /**
+   * @brief This function is called when input data from a DAQ is available.
+   *
+   * @param daqdata Input data from DAQ
+   *
+   * @return true if no error. False to stop the stream from running.
+   */
+  virtual bool inCallback(const DaqData &daqdata) = 0;
 
-    /**
-     * @brief Reset in-data handler. 
-     *
-     * @param daq New DAQ configuration of inCallback(). If nullptr is given,
-     * it means that the stream is stopped.
-     */
-    virtual void reset(const Daq* daq = nullptr) = 0;
+  /**
+   * @brief Reset in-data handler.
+   *
+   * @param daq New DAQ configuration of inCallback(). If nullptr is given,
+   * it means that the stream is stopped.
+   */
+  virtual void reset(const Daq *daq = nullptr) = 0;
 
-    /**
-     * @brief This function should be called from the constructor of the
-     * implementation of InDataHandler. It will start the stream's calling of
-     * inCallback().
-     */
-    void start();
+  /**
+   * @brief This function should be called from the constructor of the
+   * implementation of InDataHandler. It will start the stream's calling of
+   * inCallback().
+   */
+  void start();
 
-    /**
-     * @brief This function should be called from the destructor of derived
-     * classes, to disable the calls to inCallback(), such that proper
-     * destruction of the object is allowed and no other threads call methods
-     * from the object. It removes the inCallback() from the callback list of the
-     * StreamMgr(). **Failing to call this function results in deadlocks, errors
-     * like "pure virtual function called", or other**.
-     */
-    void stop();
+  /**
+   * @brief This function should be called from the destructor of derived
+   * classes, to disable the calls to inCallback(), such that proper
+   * destruction of the object is allowed and no other threads call methods
+   * from the object. It removes the inCallback() from the callback list of the
+   * StreamMgr(). **Failing to call this function results in deadlocks, errors
+   * like "pure virtual function called", or other**.
+   */
+  void stop();
 };
 
 /**
@@ -152,8 +152,8 @@ class StreamMgr {
    * @param callback Function to call when complete.
    */
   void
-    rescanDAQDevices(bool background = false,
-        std::function<void()> callback = std::function<void()>());
+  rescanDAQDevices(bool background = false,
+                   std::function<void()> callback = std::function<void()>());
 
   /**
    * @brief Start a stream based on given configuration.
@@ -173,13 +173,13 @@ class StreamMgr {
     return getStreamStatus(type).runningOK();
   }
   bool isStreamRunning(const StreamType type) const {
-    switch(type) {
-      case(StreamType::input): 
-        return bool(_inputStream);
-        break;
-      case(StreamType::output): 
-        return bool(_outputStream);
-        break;
+    switch (type) {
+    case (StreamType::input):
+      return bool(_inputStream);
+      break;
+    case (StreamType::output):
+      return bool(_outputStream);
+      break;
     }
     return false;
   }
@@ -225,7 +225,7 @@ class StreamMgr {
    */
   void setSiggen(std::shared_ptr<Siggen> s);
 
-  private:
+private:
   bool inCallback(const DaqData &data);
   bool outCallback(DaqData &data);
 
diff --git a/src/lasp/lasp_slm.py b/src/lasp/lasp_slm.py
index 3fae3b9..f00af31 100644
--- a/src/lasp/lasp_slm.py
+++ b/src/lasp/lasp_slm.py
@@ -125,7 +125,7 @@ class SLM:
         if prefilter is not None:
             self.slm = cppSLM.fromBiquads(fs, level_ref_value, dsfac,
                                           tw[0],
-                                          prefilter, sos)
+                                          prefilter.flatten(), sos)
         else:
             self.slm = cppSLM.fromBiquads(fs, level_ref_value, dsfac,
                                           tw[0],
@@ -145,11 +145,7 @@ class SLM:
             data: one-dimensional input data
         """
 
-        assert data.ndim == 2
-        assert data.shape[1] == 1, "invalid number of channels, should be 1"
-
-        if data.shape[0] == 0:
-            return {}
+        assert data.ndim == 1
 
         levels = self.slm.run(data)
 
@@ -197,10 +193,10 @@ class SLM:
         logging.debug(output['mid'])
 
         if self.include_overall and self.fbdesigner is not None:
-            output['overall'] = dat[-1,0]
-            output['y'] = np.asarray(dat[:-1,0])
+            output['overall'] = dat[-1]
+            output['y'] = np.asarray(dat[:-1])
         else:
-            output['y'] = np.asarray(dat[:,0])
+            output['y'] = np.asarray(dat[:])
         return output
 
     def Leq(self):
diff --git a/src/lasp/pybind11/lasp_dsp_pybind.cpp b/src/lasp/pybind11/lasp_dsp_pybind.cpp
index f301a3e..85fd8ef 100644
--- a/src/lasp/pybind11/lasp_dsp_pybind.cpp
+++ b/src/lasp/pybind11/lasp_dsp_pybind.cpp
@@ -1,15 +1,16 @@
-#include <carma>
+#include "arma_npy.h"
 #include "lasp_avpowerspectra.h"
 #include "lasp_biquadbank.h"
 #include "lasp_fft.h"
-#include "lasp_streammgr.h"
 #include "lasp_filter.h"
 #include "lasp_slm.h"
+#include "lasp_streammgr.h"
 #include "lasp_window.h"
 #include <iostream>
 #include <pybind11/pybind11.h>
 
 using std::cerr;
+using std::endl;
 namespace py = pybind11;
 
 /**
@@ -23,6 +24,7 @@ namespace py = pybind11;
  *
  * @param m The Python module to add classes and methods to
  */
+
 void init_dsp(py::module &m) {
 
   py::class_<Fft> fft(m, "Fft");
@@ -53,22 +55,30 @@ void init_dsp(py::module &m) {
   py::class_<SeriesBiquad, std::shared_ptr<SeriesBiquad>> sbq(m, "SeriesBiquad",
                                                               filter);
   sbq.def(py::init<const vd &>());
-  sbq.def("filter", [](SeriesBiquad &s, const vd &input) {
-    vd res = input;
+  sbq.def("filter", [](SeriesBiquad &s, dpyarray input) {
+    vd res = NpyToCol<d, true>(input);
     s.filter(res);
-    return res;
+    return ColToNpy<d>(res);
   });
 
   /// BiquadBank
   py::class_<BiquadBank, std::shared_ptr<BiquadBank>> bqb(m, "BiquadBank");
   bqb.def(py::init<const dmat &, const vd *>());
-  bqb.def("setGains", &BiquadBank::setGains);
-  bqb.def("filter", &BiquadBank::filter);
+  bqb.def("setGains", [](BiquadBank &b, dpyarray gains) {
+    b.setGains(NpyToCol(gains));
+  });
+  bqb.def("filter", [](BiquadBank &b, dpyarray input) {
+    vd inout = NpyToCol<d, true>(input);
+    b.filter(inout);
+    return ColToNpy(inout);
+  });
 
   /// PowerSpectra
   py::class_<PowerSpectra> ps(m, "PowerSpectra");
   ps.def(py::init<const us, const Window::WindowType>());
-  ps.def("compute", &PowerSpectra::compute);
+  ps.def("compute", [](PowerSpectra &ps, dpyarray input) {
+    return CubeToNpy<c>(ps.compute(NpyToMat<d, false>(input)));
+  });
 
   /// AvPowerSpectra
   py::class_<AvPowerSpectra> aps(m, "AvPowerSpectra");
@@ -77,29 +87,37 @@ void init_dsp(py::module &m) {
           py::arg("windowType") = Window::WindowType::Hann,
           py::arg("overlap_percentage") = 50.0, py::arg("time_constant") = -1);
 
-  aps.def("compute", [](AvPowerSpectra &aps, const dmat &timedata) {
-    std::optional<arma::cx_cube> res = aps.compute(timedata);
-    return res.value_or(arma::cx_cube(0, 0, 0));
+  aps.def("compute", [](AvPowerSpectra &aps, dpyarray timedata) {
+    std::optional<arma::cx_cube> res =
+        aps.compute(NpyToMat<d, false>(timedata));
+
+    return CubeToNpy<c>(res.value_or(cube(0, 0, 0)));
   });
 
   py::class_<SLM> slm(m, "cppSLM");
 
-  slm.def_static(
-      "fromBiquads",
-      py::overload_cast<const d, const d, const us, const d, const dmat &>(
-          &SLM::fromBiquads));
-  slm.def_static(
-      "fromBiquads",
-      py::overload_cast<const d, const d, const us, const d, const vd &,
-                        const dmat &>(&SLM::fromBiquads));
-  slm.def("run", &SLM::run);
-  slm.def_readonly("Pm", &SLM::Pm);
-  slm.def_readonly("Pmax", &SLM::Pmax);
-  slm.def_readonly("Ppeak", &SLM::Ppeak);
-  slm.def("Lpeak", &SLM::Lpeak);
-  slm.def("Leq", &SLM::Leq);
-  slm.def("Lmax", &SLM::Lmax);
-  slm.def_static("suggestedDownSamplingFac", &SLM::suggestedDownSamplingFac);
+  slm.def_static("fromBiquads", [](const d fs, const d Lref, const us ds,
+                                   const d tau, dpyarray bandpass) {
+    return SLM::fromBiquads(fs, Lref, ds, tau, NpyToMat<d, false>(bandpass));
+  });
 
+  slm.def_static("fromBiquads", [](const d fs, const d Lref, const us ds,
+                                   const d tau, dpyarray prefilter,
+                                   py::array_t<d> bandpass) {
+    return SLM::fromBiquads(fs, Lref, ds, tau, NpyToCol<d, false>(prefilter),
+                            NpyToMat<d, false>(bandpass));
+  });
+
+  slm.def("run", [](SLM &slm, dpyarray in) {
+    return MatToNpy<d>(slm.run(NpyToCol<d, false>(in)));
+  });
+  slm.def("Pm", [](const SLM &slm) { return ColToNpy<d>(slm.Pm); });
+  slm.def("Pmax", [](const SLM &slm) { return ColToNpy<d>(slm.Pmax); });
+  slm.def("Ppeak", [](const SLM &slm) { return ColToNpy<d>(slm.Ppeak); });
+
+  slm.def("Leq", [](const SLM &slm) { return ColToNpy<d>(slm.Leq()); });
+  slm.def("Lmax", [](const SLM &slm) { return ColToNpy<d>(slm.Lmax()); });
+  slm.def("Lpeak", [](const SLM &slm) { return ColToNpy<d>(slm.Lpeak()); });
+  slm.def_static("suggestedDownSamplingFac", &SLM::suggestedDownSamplingFac);
 }
 /** @} */
diff --git a/src/lasp/pybind11/lasp_pyindatahandler.cpp b/src/lasp/pybind11/lasp_pyindatahandler.cpp
index 046620d..e607143 100644
--- a/src/lasp/pybind11/lasp_pyindatahandler.cpp
+++ b/src/lasp/pybind11/lasp_pyindatahandler.cpp
@@ -1,6 +1,6 @@
-#include <carma>
 #include <armadillo>
 #define DEBUGTRACE_ENABLED
+#include "arma_npy.h"
 #include "debugtrace.hpp"
 #include "lasp_ppm.h"
 #include "lasp_rtaps.h"
@@ -25,7 +25,8 @@ namespace py = pybind11;
  *
  * @return Numpy array
  */
-template <typename T,bool copy=false> py::array_t<T> getPyArrayNoCpy(const DaqData &d) {
+template <typename T, bool copy = false>
+py::array_t<T> getPyArrayNoCpy(const DaqData &d) {
   // https://github.com/pybind/pybind11/issues/323
   //
   // When a valid object is passed as 'base', it tells pybind not to take
@@ -57,7 +58,8 @@ template <typename T,bool copy=false> py::array_t<T> getPyArrayNoCpy(const DaqDa
   );
 }
 
-template <typename T,bool copy=false> py::array_t<d> dmat_to_ndarray(const DaqData &d) {
+template <typename T, bool copy = false>
+py::array_t<d> dmat_to_ndarray(const DaqData &d) {
   // https://github.com/pybind/pybind11/issues/323
   //
   // When a valid object is passed as 'base', it tells pybind not to take
@@ -183,10 +185,11 @@ void init_datahandler(py::module &m) {
   ppm.def(py::init<StreamMgr &>());
 
   ppm.def("getCurrentValue", [](const PPMHandler &ppm) {
+
     std::tuple<vd, arma::uvec> tp = ppm.getCurrentValue();
 
-    return py::make_tuple(carma::col_to_arr(std::get<0>(tp)),
-                          carma::col_to_arr(std::get<1>(tp)));
+    return py::make_tuple(ColToNpy<d>(std::get<0>(tp)),
+        ColToNpy<arma::uword>(std::get<1>(tp)));
   });
 
   /// Real time Aps
@@ -214,8 +217,8 @@ void init_datahandler(py::module &m) {
   rtaps.def("getCurrentValue", [](RtAps &rt) {
     std::unique_ptr<cube> val = rt.getCurrentValue();
     if (val) {
-      return carma::cube_to_arr<c>(std::move(*val));
+      return CubeToNpy<c> (*val);
     }
-    return carma::cube_to_arr<c>(cube(1, 0, 0));
+      return CubeToNpy<c>(cube(1,0,0));
   });
 }
diff --git a/src/lasp/pybind11/lasp_siggen.cpp b/src/lasp/pybind11/lasp_siggen.cpp
index 5b1eaab..ecad69f 100644
--- a/src/lasp/pybind11/lasp_siggen.cpp
+++ b/src/lasp/pybind11/lasp_siggen.cpp
@@ -1,4 +1,3 @@
-#include <carma>
 #include "lasp_avpowerspectra.h"
 #include "lasp_biquadbank.h"
 #include "lasp_fft.h"
@@ -33,7 +32,7 @@ void init_siggen(py::module &m) {
   siggen.def("setMute", &Siggen::setMute);
   siggen.def("setLevel", &Siggen::setLevel);
   siggen.def("setLevel", &Siggen::setLevel, py::arg("newLevel"), py::arg("dB") = true);
-  siggen.def("genSignal", &Siggen::genSignal);
+  /* siggen.def("genSignal", &Siggen::genSignal); */
   siggen.def("setFilter", &Siggen::setFilter);
 
   py::class_<Noise,std::shared_ptr<Noise>> noise(m, "Noise", siggen);