diff --git a/tools/mtmd/mtmd-helper-gen.cpp b/tools/mtmd/mtmd-helper-gen.cpp
index dcd802c6ad..e98e9dfeeb 100644
--- a/tools/mtmd/mtmd-helper-gen.cpp
+++ b/tools/mtmd/mtmd-helper-gen.cpp
@@ -83,7 +83,7 @@ public:
     // (e.g. continuous/diffusion models); such pipelines read whatever they need
     // directly off h_state_in instead
     virtual int32_t step(llama_token sampled, const float * h_state_in, const float ** h_state_out) = 0;
-    virtual int32_t get_output(int32_t * out_sample_rate, const char ** out_data, size_t * out_data_len) = 0;
+    virtual int32_t get_output(int32_t * out_sample_rate, const char ** out_data, size_t * out_data_len, int64_t * out_n_samples) = 0;
 
 protected:
     llama_context * lctx;
@@ -255,12 +255,15 @@ public:
         return 0;
     }
 
-    int32_t get_output(int32_t * out_sample_rate, const char ** out_data, size_t * out_data_len) override {
+    int32_t get_output(int32_t * out_sample_rate, const char ** out_data, size_t * out_data_len, int64_t * out_n_samples) override {
         if (!flush_c2w()) {
             return 1;
         }
 
         *out_sample_rate = info.sample_rate;
+        if (out_n_samples) {
+            *out_n_samples = (int64_t) audio_pcm.size();
+        }
 
         if (out_type == MTMD_HELPER_GEN_AUDIO_OUTTYPE_PCM) {
             *out_data     = (const char *) audio_pcm.data();
@@ -445,9 +448,9 @@ int32_t mtmd_helper_gen_audio_step(mtmd_helper_gen_audio * ctx, llama_token samp
 }
 
 int32_t mtmd_helper_gen_audio_get_output(mtmd_helper_gen_audio * ctx, int32_t * out_sample_rate,
-                                         const char ** out_data, size_t * out_data_len) {
+                                         const char ** out_data, size_t * out_data_len, int64_t * out_n_samples) {
     if (!ctx->pipeline) {
         return 1;
     }
-    return ctx->pipeline->get_output(out_sample_rate, out_data, out_data_len);
+    return ctx->pipeline->get_output(out_sample_rate, out_data, out_data_len, out_n_samples);
 }
diff --git a/tools/mtmd/mtmd-helper.h b/tools/mtmd/mtmd-helper.h
index f7fd722335..c065039f8f 100644
--- a/tools/mtmd/mtmd-helper.h
+++ b/tools/mtmd/mtmd-helper.h
@@ -204,11 +204,14 @@ MTMD_API int32_t mtmd_helper_gen_audio_step(
                         const float ** h_state_out);
 
 // out_data valid until next get_output() or reset() call
+// out_n_samples (optional, can be NULL) receives the number of generated PCM samples,
+// which combined with out_sample_rate gives the output audio duration
 MTMD_API int32_t mtmd_helper_gen_audio_get_output(
                         mtmd_helper_gen_audio * ctx,
                         int32_t * out_sample_rate,
                         const char ** out_data,
-                        size_t * out_data_len);
+                        size_t * out_data_len,
+                        int64_t * out_n_samples);
 
 #ifdef __cplusplus
 } // extern "C"
@@ -247,8 +250,8 @@ struct gen_audio {
     int32_t step(llama_token sampled, const float * h_state, const float ** h_state_out) {
         return mtmd_helper_gen_audio_step(ctx.get(), sampled, h_state, h_state_out);
     }
-    int32_t get_output(int32_t * out_sample_rate, const char ** out_data, size_t * out_data_len) {
-        return mtmd_helper_gen_audio_get_output(ctx.get(), out_sample_rate, out_data, out_data_len);
+    int32_t get_output(int32_t * out_sample_rate, const char ** out_data, size_t * out_data_len, int64_t * out_n_samples = nullptr) {
+        return mtmd_helper_gen_audio_get_output(ctx.get(), out_sample_rate, out_data, out_data_len, out_n_samples);
     }
 };
 
diff --git a/tools/tts/tts.cpp b/tools/tts/tts.cpp
index cc2bca6a40..23e797dc12 100644
--- a/tools/tts/tts.cpp
+++ b/tools/tts/tts.cpp
@@ -113,7 +113,6 @@ int main(int argc, char ** argv) {
         LOG_ERR("set_input failed\n");
         return 1;
     }
-    LOG_INF("prompt eval took %.2f seconds\n", (ggml_time_us() - t_prompt_start_us) / 1e6);
 
     // codec_0 (backbone) EOS token: ordinary LLM sampling concern, kept out of the
     // model-agnostic audio-generation helper
@@ -139,6 +138,7 @@ int main(int argc, char ** argv) {
     const float * h_state = llama_get_embeddings_ith(lctx, -1);
 
     tts_timings timings;
+    const int64_t t_gen_start_us = ggml_time_us();
 
     for (; n_frames < max_new && sampled != codec_eos_tok; n_frames++) {
         const float * h_next = nullptr;
@@ -150,16 +150,24 @@ int main(int argc, char ** argv) {
         sampled = sample_codec0();
         timings.report(n_frames + 1);
     }
+    const double t_gen_s = (ggml_time_us() - t_gen_start_us) / 1e6;
 
     int32_t      sample_rate = 0;
     const char * data        = nullptr;
     size_t       data_len    = 0;
-    if (gen.get_output(&sample_rate, &data, &data_len) != 0) {
+    int64_t      n_samples   = 0;
+    if (gen.get_output(&sample_rate, &data, &data_len, &n_samples) != 0) {
         LOG_ERR("get_output failed\n");
         return 1;
     }
 
     LOG_INF("generated %d frames, %zu bytes of WAV audio (%d Hz)\n", n_frames, data_len, sample_rate);
+
+    const double t_prompt_s = (t_gen_start_us - t_prompt_start_us) / 1e6;
+    const double t_total_s  = t_prompt_s + t_gen_s;
+    const double audio_s    = sample_rate > 0 ? (double) n_samples / sample_rate : 0.0;
+    LOG_INF("timings: prompt eval %.2fs + generation %.2fs = total %.2fs\n", t_prompt_s, t_gen_s, t_total_s);
+    LOG_INF("         output audio = %.2fs (audio time = %.2fx process time)\n", audio_s, t_total_s > 0 ? audio_s / t_total_s : 0.0);
     FILE * f = fopen(params.out_file.c_str(), "wb");
     if (!f) {
         LOG_ERR("failed to open %s\n", params.out_file.c_str());