diff --git a/audplot/core/api.py b/audplot/core/api.py
index 9a28a12..e2cf0ac 100644
--- a/audplot/core/api.py
+++ b/audplot/core/api.py
@@ -98,6 +98,7 @@ def confusion_matrix(
     *,
     labels: Sequence = None,
     label_aliases: dict = None,
+    metric: Callable = audmetric.confusion_matrix,
     percentage: bool = False,
     show_both: bool = False,
     ax: matplotlib.axes.Axes = None,
@@ -112,6 +113,11 @@ def confusion_matrix(
         labels: labels to be included in confusion matrix
         label_aliases: mapping to alias names for labels
             to be presented in the plot
+        metric: calculator of confusion matrix.
+            The callable is expected
+            to have the two arguments ``truth`` and ``prediction``,
+            and the keyword arguments ``labels`` and ``normalize``.
+            Defaults to :func:`audmetric.confusion_matrix`
         percentage: if ``True`` present the confusion matrix
             with percentage values instead of absolute numbers
         show_both: if ``True`` and percentage is ``True``
@@ -169,7 +175,7 @@ def confusion_matrix(
     if labels is None:
         labels = audmetric.utils.infer_labels(truth, prediction)
 
-    cm = audmetric.confusion_matrix(
+    cm = metric(
         truth,
         prediction,
         labels=labels,
@@ -190,7 +196,7 @@ def confusion_matrix(
 
     # Add a second row of annotations if requested
     if show_both:
-        cm2 = audmetric.confusion_matrix(
+        cm2 = metric(
             truth,
             prediction,
             labels=labels,