diff --git a/.gitignore b/.gitignore
index 773257b..1ff733b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,5 +24,11 @@ web/openai/
 web/*-web.zip
 sdr-visual-suite.zip
 
+# downloaded decoder binaries
+tools/downloads/
+tools/wsjtx/
+tools/fldigi/
+tools/dsd-neo/
+
 # temp binaries
 sdrd.exe~
diff --git a/README.md b/README.md
index 76c93e4..49ab1ed 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,7 @@ Edit `config.yaml`:
 - `detector.threshold_db`: power threshold in dB
 - `detector.min_duration_ms`, `detector.hold_ms`: debounce/merge
 - `recorder.*`: enable IQ/audio recording, preroll, output_dir, max_disk_mb
-- `decoder.*`: external decode commands (use `{iq}` and `{sr}` placeholders)
+- `decoder.*`: external decode commands (use `{iq}`, `{audio}`, `{sr}` placeholders)
 
 ## APIs
 ### Config API
diff --git a/cmd/sdrd/main.go b/cmd/sdrd/main.go
index be82f64..280b458 100644
--- a/cmd/sdrd/main.go
+++ b/cmd/sdrd/main.go
@@ -570,7 +570,11 @@ func main() {
 				http.Error(w, "meta read failed", http.StatusInternalServerError)
 				return
 			}
-			res, err := recorder.DecodeOnDemand(cmd, filepath.Join(base, "signal.cf32"), meta.SampleRate)
+			audioPath := filepath.Join(base, "audio.wav")
+			if _, errStat := os.Stat(audioPath); errStat != nil {
+				audioPath = ""
+			}
+			res, err := recorder.DecodeOnDemand(cmd, filepath.Join(base, "signal.cf32"), meta.SampleRate, audioPath)
 			if err != nil {
 				http.Error(w, res.Stderr, http.StatusInternalServerError)
 				return
diff --git a/config.yaml b/config.yaml
index 69d1757..972fb68 100644
--- a/config.yaml
+++ b/config.yaml
@@ -32,8 +32,8 @@ recorder:
 decoder:
   ft8_cmd: "tools/ft8/ft8_decoder --iq {iq} --sample-rate {sr}"
   wspr_cmd: "tools/wspr/wspr_decoder --iq {iq} --sample-rate {sr}"
-  dmr_cmd: "tools/dmr/dmr_decoder --iq {iq} --sample-rate {sr}"
-  dstar_cmd: "tools/dstar/dstar_decoder --iq {iq} --sample-rate {sr}"
+  dmr_cmd: "tools/dsd-neo/bin/dsd-neo.exe -fs -i {audio} -s {sr} -o null"
+  dstar_cmd: "tools/dsd-neo/bin/dsd-neo.exe -fd -i {audio} -s {sr} -o null"
   fsk_cmd: "tools/fsk/fsk_decoder --iq {iq} --sample-rate {sr}"
   psk_cmd: "tools/psk/psk_decoder --iq {iq} --sample-rate {sr}"
 web_addr: ":8080"
diff --git a/internal/decoder/decoder.go b/internal/decoder/decoder.go
index 8bb15e5..33b3a2d 100644
--- a/internal/decoder/decoder.go
+++ b/internal/decoder/decoder.go
@@ -3,6 +3,7 @@ package decoder
 import (
 	"errors"
 	"os/exec"
+	"strconv"
 	"strings"
 )
 
@@ -12,14 +13,20 @@ type Result struct {
 	Code   int    `json:"code"`
 }
 
-// Run executes an external decoder command. If cmdTemplate contains {iq} or {sr}, they are replaced.
+// Run executes an external decoder command. If cmdTemplate contains {iq}/{sr}/{audio}, they are replaced.
 // Otherwise, --iq and --sample-rate args are appended.
-func Run(cmdTemplate string, iqPath string, sampleRate int) (Result, error) {
+func Run(cmdTemplate string, iqPath string, sampleRate int, audioPath string) (Result, error) {
 	if cmdTemplate == "" {
 		return Result{}, errors.New("decoder command empty")
 	}
 	cmdStr := strings.ReplaceAll(cmdTemplate, "{iq}", iqPath)
-	cmdStr = strings.ReplaceAll(cmdStr, "{sr}", intToString(sampleRate))
+	cmdStr = strings.ReplaceAll(cmdStr, "{sr}", strconv.Itoa(sampleRate))
+	if strings.Contains(cmdTemplate, "{audio}") {
+		if audioPath == "" {
+			return Result{}, errors.New("audio path required for decoder")
+		}
+		cmdStr = strings.ReplaceAll(cmdStr, "{audio}", audioPath)
+	}
 	parts := strings.Fields(cmdStr)
 	if len(parts) == 0 {
 		return Result{}, errors.New("invalid decoder command")
@@ -29,7 +36,7 @@ func Run(cmdTemplate string, iqPath string, sampleRate int) (Result, error) {
 		cmd.Args = append(cmd.Args, "--iq", iqPath)
 	}
 	if !strings.Contains(cmdTemplate, "{sr}") {
-		cmd.Args = append(cmd.Args, "--sample-rate", intToString(sampleRate))
+		cmd.Args = append(cmd.Args, "--sample-rate", strconv.Itoa(sampleRate))
 	}
 	out, err := cmd.CombinedOutput()
 	res := Result{Stdout: string(out), Code: 0}
@@ -40,29 +47,3 @@ func Run(cmdTemplate string, iqPath string, sampleRate int) (Result, error) {
 	}
 	return res, nil
 }
-
-func intToString(v int) string {
-	return strings.TrimSpace(strings.TrimPrefix(strings.TrimPrefix(strings.TrimPrefix(strings.TrimSpace(strings.TrimSpace(strings.TrimSpace((func() string { return string(rune('0')) })()))), ""), ""), "")) + itoa(v)
-}
-
-func itoa(v int) string {
-	if v == 0 {
-		return "0"
-	}
-	n := v
-	if n < 0 {
-		n = -n
-	}
-	buf := make([]byte, 0, 12)
-	for n > 0 {
-		buf = append(buf, byte('0'+n%10))
-		n /= 10
-	}
-	if v < 0 {
-		buf = append(buf, '-')
-	}
-	for i, j := 0, len(buf)-1; i < j; i, j = i+1, j-1 {
-		buf[i], buf[j] = buf[j], buf[i]
-	}
-	return string(buf)
-}
diff --git a/internal/recorder/decode.go b/internal/recorder/decode.go
index acc1063..f35562b 100644
--- a/internal/recorder/decode.go
+++ b/internal/recorder/decode.go
@@ -18,7 +18,13 @@ func (m *Manager) runDecodeIfConfigured(mod string, iqPath string, sampleRate in
 	if cmd == "" {
 		return
 	}
-	res, err := decoder.Run(cmd, iqPath, sampleRate)
+	audioPath := ""
+	if v, ok := files["audio"]; ok {
+		if name, ok := v.(string); ok {
+			audioPath = filepath.Join(dir, name)
+		}
+	}
+	res, err := decoder.Run(cmd, iqPath, sampleRate, audioPath)
 	if err != nil {
 		return
 	}
diff --git a/internal/recorder/decode_on_demand.go b/internal/recorder/decode_on_demand.go
index 96fdaa2..ff26cb5 100644
--- a/internal/recorder/decode_on_demand.go
+++ b/internal/recorder/decode_on_demand.go
@@ -6,9 +6,9 @@ import (
 	"sdr-visual-suite/internal/decoder"
 )
 
-func DecodeOnDemand(cmd string, iqPath string, sampleRate int) (decoder.Result, error) {
+func DecodeOnDemand(cmd string, iqPath string, sampleRate int, audioPath string) (decoder.Result, error) {
 	if cmd == "" {
 		return decoder.Result{}, errors.New("decoder command empty")
 	}
-	return decoder.Run(cmd, iqPath, sampleRate)
+	return decoder.Run(cmd, iqPath, sampleRate, audioPath)
 }
diff --git a/tools/README.md b/tools/README.md
index d9c920f..c2d8d6a 100644
--- a/tools/README.md
+++ b/tools/README.md
@@ -10,9 +10,18 @@ Examples (Windows):
 - `tools/fsk/fsk_decoder.bat`
 - `tools/psk/psk_decoder.bat`
 
-Each script should accept:
+Each script should accept either IQ or audio:
 ```
 --iq <path> --sample-rate <sr>
 ```
+Or:
+```
+--audio <path> --sample-rate <sr>
+```
+
+The app replaces `{iq}`, `{sr}`, and `{audio}` placeholders in config commands.
 
-The app replaces `{iq}` and `{sr}` placeholders in config commands.
+Downloaded:
+- WSJT-X installer: tools/wsjtx/wsjtx-2.7.0-win64.exe
+- fldigi installer: tools/fldigi/fldigi-latest.exe
+- dsd-neo binary: tools/dsd-neo/bin/dsd-neo.exe