diff --git a/src/Listen.cxx b/src/Listen.cxx
index 14e194099..34a9fe8d9 100644
--- a/src/Listen.cxx
+++ b/src/Listen.cxx
@@ -25,13 +25,16 @@
 #include "config/Data.hxx"
 #include "config/Option.hxx"
 #include "config/Net.hxx"
+#include "lib/fmt/ExceptionFormatter.hxx"
+#include "lib/fmt/PathFormatter.hxx"
 #include "net/AllocatedSocketAddress.hxx"
 #include "net/UniqueSocketDescriptor.hxx"
 #include "net/SocketUtil.hxx"
 #include "system/Error.hxx"
-#include "util/RuntimeError.hxx"
 #include "fs/AllocatedPath.hxx"
 #include "fs/XDG.hxx"
+#include "util/Domain.hxx"
+#include "util/RuntimeError.hxx"
 
 #include <sys/stat.h>
 
@@ -41,6 +44,10 @@
 
 #define DEFAULT_PORT	6600
 
+#if defined(USE_XDG) && defined(HAVE_UN)
+static constexpr Domain listen_domain("listen");
+#endif
+
 int listen_port;
 
 #ifdef ENABLE_SYSTEMD_DAEMON
@@ -98,9 +105,9 @@ ListenXdgRuntimeDir(ClientListener &listener) noexcept
 		listener.AddFD(std::move(fd), std::move(address));
 		return true;
 	} catch (...) {
-		FormatError(std::current_exception(),
-			    "Failed to listen on '%s' (not fatal)",
-			    socket_path.c_str());
+		FmtError(listen_domain,
+			 "Failed to listen on '{}' (not fatal): {}",
+			 socket_path, std::current_exception());
 		return false;
 	}
 #else
diff --git a/src/Log.cxx b/src/Log.cxx
index e174355e8..505ff3e4a 100644
--- a/src/Log.cxx
+++ b/src/Log.cxx
@@ -17,17 +17,12 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "LogV.hxx"
+#include "Log.hxx"
+#include "lib/fmt/ExceptionFormatter.hxx"
 #include "util/Domain.hxx"
-#include "util/Exception.hxx"
 
 #include <fmt/format.h>
 
-#include <cerrno>
-
-#include <stdio.h>
-#include <string.h>
-
 static constexpr Domain exception_domain("exception");
 
 void
@@ -43,128 +38,14 @@ LogVFmt(LogLevel level, const Domain &domain,
 	Log(level, domain, {buffer.data(), buffer.size()});
 }
 
-void
-LogFormatV(LogLevel level, const Domain &domain,
-	   const char *fmt, std::va_list ap) noexcept
-{
-	char msg[1024];
-	vsnprintf(msg, sizeof(msg), fmt, ap);
-	Log(level, domain, msg);
-}
-
-void
-LogFormat(LogLevel level, const Domain &domain, const char *fmt, ...) noexcept
-{
-	std::va_list ap;
-	va_start(ap, fmt);
-	LogFormatV(level, domain, fmt, ap);
-	va_end(ap);
-}
-
-void
-FormatDebug(const Domain &domain, const char *fmt, ...) noexcept
-{
-	std::va_list ap;
-	va_start(ap, fmt);
-	LogFormatV(LogLevel::DEBUG, domain, fmt, ap);
-	va_end(ap);
-}
-
-void
-FormatWarning(const Domain &domain, const char *fmt, ...) noexcept
-{
-	std::va_list ap;
-	va_start(ap, fmt);
-	LogFormatV(LogLevel::WARNING, domain, fmt, ap);
-	va_end(ap);
-}
-
-void
-Log(LogLevel level, const std::exception &e) noexcept
-{
-	Log(level, exception_domain, GetFullMessage(e).c_str());
-}
-
-void
-Log(LogLevel level, const std::exception &e, const char *msg) noexcept
-{
-	LogFormat(level, exception_domain, "%s: %s", msg, GetFullMessage(e).c_str());
-}
-
-void
-LogFormat(LogLevel level, const std::exception &e, const char *fmt, ...) noexcept
-{
-	char msg[1024];
-	std::va_list ap;
-	va_start(ap, fmt);
-	vsnprintf(msg, sizeof(msg), fmt, ap);
-	va_end(ap);
-
-	Log(level, e, msg);
-}
-
 void
 Log(LogLevel level, const std::exception_ptr &ep) noexcept
 {
-	Log(level, exception_domain, GetFullMessage(ep).c_str());
+	Log(level, exception_domain, GetFullMessage(ep));
 }
 
 void
 Log(LogLevel level, const std::exception_ptr &ep, const char *msg) noexcept
 {
-	LogFormat(level, exception_domain, "%s: %s", msg,
-		  GetFullMessage(ep).c_str());
-}
-
-void
-LogFormat(LogLevel level, const std::exception_ptr &ep, const char *fmt, ...) noexcept
-{
-	char msg[1024];
-	std::va_list ap;
-	va_start(ap, fmt);
-	vsnprintf(msg, sizeof(msg), fmt, ap);
-	va_end(ap);
-
-	Log(level, ep, msg);
-}
-
-void
-LogErrno(const Domain &domain, int e, const char *msg) noexcept
-{
-	LogFormat(LogLevel::ERROR, domain, "%s: %s", msg, strerror(e));
-}
-
-void
-LogErrno(const Domain &domain, const char *msg) noexcept
-{
-	LogErrno(domain, errno, msg);
-}
-
-static void
-FormatErrnoV(const Domain &domain, int e, const char *fmt, std::va_list ap) noexcept
-{
-	char msg[1024];
-	vsnprintf(msg, sizeof(msg), fmt, ap);
-
-	LogErrno(domain, e, msg);
-}
-
-void
-FormatErrno(const Domain &domain, int e, const char *fmt, ...) noexcept
-{
-	std::va_list ap;
-	va_start(ap, fmt);
-	FormatErrnoV(domain, e, fmt, ap);
-	va_end(ap);
-}
-
-void
-FormatErrno(const Domain &domain, const char *fmt, ...) noexcept
-{
-	const int e = errno;
-
-	std::va_list ap;
-	va_start(ap, fmt);
-	FormatErrnoV(domain, e, fmt, ap);
-	va_end(ap);
+	LogFmt(level, exception_domain, "{}: {}", msg, ep);
 }
diff --git a/src/Log.hxx b/src/Log.hxx
index d276685cd..186131087 100644
--- a/src/Log.hxx
+++ b/src/Log.hxx
@@ -21,7 +21,6 @@
 #define MPD_LOG_HXX
 
 #include "LogLevel.hxx"
-#include "util/Compiler.h"
 
 #include <fmt/core.h>
 #if FMT_VERSION < 70000 || FMT_VERSION >= 80000
@@ -97,45 +96,18 @@ FmtError(const Domain &domain,
 	LogFmt(LogLevel::ERROR, domain, format_str, args...);
 }
 
-gcc_printf(3,4)
-void
-LogFormat(LogLevel level, const Domain &domain, const char *fmt, ...) noexcept;
-
-void
-Log(LogLevel level, const std::exception &e) noexcept;
-
-void
-Log(LogLevel level, const std::exception &e, const char *msg) noexcept;
-
-gcc_printf(3,4)
-void
-LogFormat(LogLevel level, const std::exception &e,
-	  const char *fmt, ...) noexcept;
-
 void
 Log(LogLevel level, const std::exception_ptr &ep) noexcept;
 
 void
 Log(LogLevel level, const std::exception_ptr &ep, const char *msg) noexcept;
 
-gcc_printf(3,4)
-void
-LogFormat(LogLevel level, const std::exception_ptr &ep,
-	  const char *fmt, ...) noexcept;
-
 static inline void
 LogDebug(const Domain &domain, const char *msg) noexcept
 {
 	Log(LogLevel::DEBUG, domain, msg);
 }
 
-gcc_printf(2,3)
-void
-FormatDebug(const Domain &domain, const char *fmt, ...) noexcept;
-
-void
-FormatDebug(const Domain &domain, const char *fmt, ...) noexcept;
-
 static inline void
 LogInfo(const Domain &domain, const char *msg) noexcept
 {
@@ -154,35 +126,12 @@ LogWarning(const Domain &domain, const char *msg) noexcept
 	Log(LogLevel::WARNING, domain, msg);
 }
 
-gcc_printf(2,3)
-void
-FormatWarning(const Domain &domain, const char *fmt, ...) noexcept;
-
 static inline void
 LogError(const Domain &domain, const char *msg) noexcept
 {
 	Log(LogLevel::ERROR, domain, msg);
 }
 
-inline void
-LogError(const std::exception &e) noexcept
-{
-	Log(LogLevel::ERROR, e);
-}
-
-inline void
-LogError(const std::exception &e, const char *msg) noexcept
-{
-	Log(LogLevel::ERROR, e, msg);
-}
-
-template<typename... Args>
-inline void
-FormatError(const std::exception &e, const char *fmt, Args&&... args) noexcept
-{
-	LogFormat(LogLevel::ERROR, e, fmt, std::forward<Args>(args)...);
-}
-
 inline void
 LogError(const std::exception_ptr &ep) noexcept
 {
@@ -195,26 +144,4 @@ LogError(const std::exception_ptr &ep, const char *msg) noexcept
 	Log(LogLevel::ERROR, ep, msg);
 }
 
-template<typename... Args>
-inline void
-FormatError(const std::exception_ptr &ep,
-	    const char *fmt, Args&&... args) noexcept
-{
-	LogFormat(LogLevel::ERROR, ep, fmt, std::forward<Args>(args)...);
-}
-
-void
-LogErrno(const Domain &domain, int e, const char *msg) noexcept;
-
-void
-LogErrno(const Domain &domain, const char *msg) noexcept;
-
-gcc_printf(3,4)
-void
-FormatErrno(const Domain &domain, int e, const char *fmt, ...) noexcept;
-
-gcc_printf(2,3)
-void
-FormatErrno(const Domain &domain, const char *fmt, ...) noexcept;
-
 #endif /* LOG_H */
diff --git a/src/LogV.hxx b/src/LogV.hxx
deleted file mode 100644
index 312ea8cc8..000000000
--- a/src/LogV.hxx
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright 2003-2021 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifndef MPD_LOGV_HXX
-#define MPD_LOGV_HXX
-
-#include "Log.hxx" // IWYU pragma: export
-
-#include <cstdarg>
-
-void
-LogFormatV(LogLevel level, const Domain &domain,
-	   const char *fmt, std::va_list ap) noexcept;
-
-#endif /* LOG_H */
diff --git a/src/RemoteTagCache.cxx b/src/RemoteTagCache.cxx
index 1e75c3a1f..4019326e4 100644
--- a/src/RemoteTagCache.cxx
+++ b/src/RemoteTagCache.cxx
@@ -19,10 +19,14 @@
 
 #include "RemoteTagCache.hxx"
 #include "RemoteTagCacheHandler.hxx"
+#include "lib/fmt/ExceptionFormatter.hxx"
 #include "input/ScanTags.hxx"
 #include "util/DeleteDisposer.hxx"
+#include "util/Domain.hxx"
 #include "Log.hxx"
 
+static constexpr Domain remote_tag_cache_domain("remote_tag_cache");
+
 RemoteTagCache::RemoteTagCache(EventLoop &event_loop,
 			       RemoteTagCacheHandler &_handler) noexcept
 	:handler(_handler),
@@ -60,9 +64,9 @@ RemoteTagCache::Lookup(const std::string &uri) noexcept
 
 			item->scanner->Start();
 		} catch (...) {
-			FormatError(std::current_exception(),
-				    "Failed to scan tags of '%s'",
-				    uri.c_str());
+			FmtError(remote_tag_cache_domain,
+				 "Failed to scan tags of '{}': {}",
+				 uri, std::current_exception());
 
 			item->scanner.reset();
 
@@ -128,7 +132,8 @@ RemoteTagCache::Item::OnRemoteTag(Tag &&_tag) noexcept
 void
 RemoteTagCache::Item::OnRemoteTagError(std::exception_ptr e) noexcept
 {
-	FormatError(e, "Failed to scan tags of '%s'", uri.c_str());
+	FmtError(remote_tag_cache_domain,
+		 "Failed to scan tags of '{}': {}", uri, e);
 
 	scanner.reset();
 
diff --git a/src/decoder/plugins/FfmpegDecoderPlugin.cxx b/src/decoder/plugins/FfmpegDecoderPlugin.cxx
index 3dfdee94f..c0ebc7b97 100644
--- a/src/decoder/plugins/FfmpegDecoderPlugin.cxx
+++ b/src/decoder/plugins/FfmpegDecoderPlugin.cxx
@@ -44,7 +44,7 @@
 #include "util/ScopeExit.hxx"
 #include "util/ConstBuffer.hxx"
 #include "util/StringAPI.hxx"
-#include "LogV.hxx"
+#include "Log.hxx"
 
 extern "C" {
 #include <libavcodec/avcodec.h>
diff --git a/src/event/Thread.cxx b/src/event/Thread.cxx
index 0c7b5b8cc..b5d4127b8 100644
--- a/src/event/Thread.cxx
+++ b/src/event/Thread.cxx
@@ -21,8 +21,12 @@
 #include "thread/Name.hxx"
 #include "thread/Slack.hxx"
 #include "thread/Util.hxx"
+#include "lib/fmt/ExceptionFormatter.hxx"
+#include "util/Domain.hxx"
 #include "Log.hxx"
 
+static constexpr Domain event_domain("event");
+
 void
 EventThread::Start()
 {
@@ -57,8 +61,9 @@ EventThread::Run() noexcept
 		try {
 			SetThreadRealtime();
 		} catch (...) {
-			Log(LogLevel::INFO, std::current_exception(),
-			    "RTIOThread could not get realtime scheduling, continuing anyway");
+			FmtInfo(event_domain,
+				"RTIOThread could not get realtime scheduling, continuing anyway: %s",
+				std::current_exception());
 		}
 	}
 
diff --git a/src/input/Init.cxx b/src/input/Init.cxx
index 16f412193..97f96f8d3 100644
--- a/src/input/Init.cxx
+++ b/src/input/Init.cxx
@@ -25,6 +25,7 @@
 #include "config/Block.hxx"
 #include "Log.hxx"
 #include "PluginUnavailable.hxx"
+#include "util/Domain.hxx"
 #include "util/RuntimeError.hxx"
 
 #include <cassert>
@@ -35,6 +36,8 @@
 #include "plugins/UringInputPlugin.hxx"
 #endif
 
+static constexpr Domain input_domain("input");
+
 void
 input_stream_global_init(const ConfigData &config, EventLoop &event_loop)
 {
@@ -67,14 +70,14 @@ input_stream_global_init(const ConfigData &config, EventLoop &event_loop)
 				plugin->init(event_loop, *block);
 			input_plugins_enabled[i] = true;
 		} catch (const PluginUnconfigured &e) {
-			LogFormat(LogLevel::DEBUG, e,
-				  "Input plugin '%s' is not configured",
-				  plugin->name);
+			FmtDebug(input_domain,
+				 "Input plugin '{}' is not configured: %s",
+				 plugin->name, e.what());
 			continue;
 		} catch (const PluginUnavailable &e) {
-			FormatError(e,
-				    "Input plugin '%s' is unavailable",
-				    plugin->name);
+			FmtDebug(input_domain,
+				 "Input plugin '{}' is unavailable: %s",
+				 plugin->name, e.what());
 			continue;
 		} catch (...) {
 			std::throw_with_nested(FormatRuntimeError("Failed to initialize input plugin '%s'",
diff --git a/src/input/plugins/ArchiveInputPlugin.cxx b/src/input/plugins/ArchiveInputPlugin.cxx
index 20a63b8f5..9f504168b 100644
--- a/src/input/plugins/ArchiveInputPlugin.cxx
+++ b/src/input/plugins/ArchiveInputPlugin.cxx
@@ -24,8 +24,13 @@
 #include "../InputStream.hxx"
 #include "fs/LookupFile.hxx"
 #include "fs/Path.hxx"
+#include "lib/fmt/ExceptionFormatter.hxx"
+#include "lib/fmt/PathFormatter.hxx"
+#include "util/Domain.hxx"
 #include "Log.hxx"
 
+static constexpr Domain input_domain("input");
+
 InputStreamPtr
 OpenArchiveInputStream(Path path, Mutex &mutex)
 {
@@ -38,8 +43,9 @@ OpenArchiveInputStream(Path path, Mutex &mutex)
 			return nullptr;
 		}
 	} catch (...) {
-		LogFormat(LogLevel::DEBUG, std::current_exception(),
-			  "not an archive, lookup %s failed", path.c_str());
+		FmtDebug(input_domain,
+			 "not an archive, lookup '{}' failed: {}",
+			 path, std::current_exception());
 		return nullptr;
 	}
 
diff --git a/src/lib/ffmpeg/LogCallback.cxx b/src/lib/ffmpeg/LogCallback.cxx
index d62c0e38c..6b2cb09f8 100644
--- a/src/lib/ffmpeg/LogCallback.cxx
+++ b/src/lib/ffmpeg/LogCallback.cxx
@@ -22,9 +22,9 @@
 
 #include "LogCallback.hxx"
 #include "Domain.hxx"
-#include "LogV.hxx"
 #include "util/Domain.hxx"
 #include "util/StringFormat.hxx"
+#include "Log.hxx"
 
 extern "C" {
 #include <libavutil/log.h>
@@ -60,6 +60,10 @@ FfmpegLogCallback(void *ptr, int level, const char *fmt, std::va_list vl)
 					 ffmpeg_domain.GetName(),
 					 cls->item_name(ptr));
 		const Domain d(domain);
-		LogFormatV(FfmpegImportLogLevel(level), d, fmt, vl);
+
+		char msg[1024];
+		vsnprintf(msg, sizeof(msg), fmt, vl);
+
+		Log(FfmpegImportLogLevel(level), d, msg);
 	}
 }
diff --git a/src/lib/nfs/Manager.cxx b/src/lib/nfs/Manager.cxx
index 9de7f3829..0056230ae 100644
--- a/src/lib/nfs/Manager.cxx
+++ b/src/lib/nfs/Manager.cxx
@@ -18,16 +18,21 @@
  */
 
 #include "Manager.hxx"
+#include "lib/fmt/ExceptionFormatter.hxx"
 #include "event/Loop.hxx"
-#include "Log.hxx"
 #include "util/DeleteDisposer.hxx"
+#include "util/Domain.hxx"
+#include "Log.hxx"
 
 #include <string.h>
 
+static constexpr Domain nfs_domain("nfs");
+
 void
 NfsManager::ManagedConnection::OnNfsConnectionError(std::exception_ptr &&e) noexcept
 {
-	FormatError(e, "NFS error on %s:%s", GetServer(), GetExportName());
+	FmtError(nfs_domain, "NFS error on '{}:{}': {}",
+		 GetServer(), GetExportName(), e);
 
 	/* defer deletion so the caller
 	   (i.e. NfsConnection::OnSocketReady()) can still use this
diff --git a/src/mixer/MixerAll.cxx b/src/mixer/MixerAll.cxx
index d8dd78f66..f5e066706 100644
--- a/src/mixer/MixerAll.cxx
+++ b/src/mixer/MixerAll.cxx
@@ -21,11 +21,15 @@
 #include "MixerControl.hxx"
 #include "MixerInternal.hxx"
 #include "MixerList.hxx"
+#include "lib/fmt/ExceptionFormatter.hxx"
 #include "pcm/Volume.hxx"
+#include "util/Domain.hxx"
 #include "Log.hxx"
 
 #include <cassert>
 
+static constexpr Domain mixer_domain("mixer");
+
 gcc_pure
 static int
 output_mixer_get_volume(const AudioOutputControl &ao) noexcept
@@ -40,9 +44,9 @@ output_mixer_get_volume(const AudioOutputControl &ao) noexcept
 	try {
 		return mixer_get_volume(mixer);
 	} catch (...) {
-		FormatError(std::current_exception(),
-			    "Failed to read mixer for '%s'",
-			    ao.GetName());
+		FmtError(mixer_domain,
+			 "Failed to read mixer for '{}': {}",
+			 ao.GetName(), std::current_exception());
 		return -1;
 	}
 }
@@ -83,9 +87,9 @@ output_mixer_set_volume(AudioOutputControl &ao, unsigned volume) noexcept
 		mixer_set_volume(mixer, volume);
 		return true;
 	} catch (...) {
-		FormatError(std::current_exception(),
-			    "Failed to set mixer for '%s'",
-			    ao.GetName());
+		FmtError(mixer_domain,
+			 "Failed to set mixer for '{}': {}",
+			 ao.GetName(), std::current_exception());
 		return false;
 	}
 }
diff --git a/src/output/Thread.cxx b/src/output/Thread.cxx
index 31797fd4d..4eb687cd2 100644
--- a/src/output/Thread.cxx
+++ b/src/output/Thread.cxx
@@ -434,8 +434,9 @@ AudioOutputControl::Task() noexcept
 	try {
 		SetThreadRealtime();
 	} catch (...) {
-		Log(LogLevel::INFO, std::current_exception(),
-		    "OutputThread could not get realtime scheduling, continuing anyway");
+		FmtInfo(output_domain,
+			"OutputThread could not get realtime scheduling, continuing anyway: %s",
+			std::current_exception());
 	}
 
 	SetThreadTimerSlack(std::chrono::microseconds(100));
diff --git a/src/output/plugins/FifoOutputPlugin.cxx b/src/output/plugins/FifoOutputPlugin.cxx
index ed42f7d74..f5f7e81c5 100644
--- a/src/output/plugins/FifoOutputPlugin.cxx
+++ b/src/output/plugins/FifoOutputPlugin.cxx
@@ -194,9 +194,9 @@ FifoOutput::Cancel() noexcept
 	} while (bytes > 0 && errno != EINTR);
 
 	if (bytes < 0 && errno != EAGAIN) {
-		FormatErrno(fifo_output_domain,
-			    "Flush of FIFO \"%s\" failed",
-			    path_utf8.c_str());
+		FmtError(fifo_output_domain,
+			 "Flush of FIFO \"{}\" failed: %s",
+			 path_utf8, strerror(errno));
 	}
 }
 
diff --git a/src/output/plugins/OssOutputPlugin.cxx b/src/output/plugins/OssOutputPlugin.cxx
index c0a4cc0e5..6e310a9d1 100644
--- a/src/output/plugins/OssOutputPlugin.cxx
+++ b/src/output/plugins/OssOutputPlugin.cxx
@@ -186,9 +186,9 @@ oss_output_test_default_device() noexcept
 		if (fd.Open(default_devices[i], O_WRONLY, 0))
 			return true;
 
-		FormatErrno(oss_output_domain,
-			    "Error opening OSS device \"%s\"",
-			    default_devices[i]);
+		FmtError(oss_output_domain,
+			 "Error opening OSS device \"{}\": {}",
+			 default_devices[i], strerror(errno));
 	}
 
 	return false;
@@ -233,8 +233,8 @@ oss_open_default(
 				   "{}: permission denied", dev);
 			break;
 		case OSS_STAT_OTHER:
-			FormatErrno(oss_output_domain, err[i],
-				    "Error accessing %s", dev);
+			FmtError(oss_output_domain, "Error accessing {}: {}",
+				 dev, strerror(err[i]));
 		}
 	}
 
diff --git a/src/pcm/SoxrResampler.cxx b/src/pcm/SoxrResampler.cxx
index 1b8c453e1..1547afbc7 100644
--- a/src/pcm/SoxrResampler.cxx
+++ b/src/pcm/SoxrResampler.cxx
@@ -227,25 +227,23 @@ SoxrPcmResampler::Open(AudioFormat &af, unsigned new_sample_rate)
 
 	FmtDebug(soxr_domain, "soxr engine '{}'", soxr_engine(soxr));
 	if (soxr_use_custom_recipe)
-		FormatDebug(soxr_domain,
-			    "soxr precision=%0.0f, phase_response=%0.2f, "
-			    "passband_end=%0.2f, stopband_begin=%0.2f scale=%0.2f",
-			    soxr_quality.precision, soxr_quality.phase_response,
-			    soxr_quality.passband_end, soxr_quality.stopband_begin,
-			    soxr_io_custom_recipe.scale);
+		FmtDebug(soxr_domain,
+			 "soxr precision={:0.0}, phase_response={:0.2}, "
+			 "passband_end={:0.2}, stopband_begin={:0.2} scale={:0.2}",
+			 soxr_quality.precision, soxr_quality.phase_response,
+			 soxr_quality.passband_end, soxr_quality.stopband_begin,
+			 soxr_io_custom_recipe.scale);
 	else
-		FormatDebug(soxr_domain,
-			    "soxr precision=%0.0f, phase_response=%0.2f, "
-			    "passband_end=%0.2f, stopband_begin=%0.2f",
-			    soxr_quality.precision, soxr_quality.phase_response,
-			    soxr_quality.passband_end, soxr_quality.stopband_begin);
+		FmtDebug(soxr_domain,
+			 "soxr precision={:0.0}, phase_response={:0.2}, "
+			 "passband_end={:0.2}, stopband_begin={:0.2}",
+			 soxr_quality.precision, soxr_quality.phase_response,
+			 soxr_quality.passband_end, soxr_quality.stopband_begin);
 
 	channels = af.channels;
 
 	ratio = float(new_sample_rate) / float(af.sample_rate);
-	FormatDebug(soxr_domain,
-		    "samplerate conversion ratio to %.2lf",
-		    double(ratio));
+	FmtDebug(soxr_domain, "samplerate conversion ratio to {:.2}", ratio);
 
 	/* libsoxr works with floating point samples */
 	af.format = SampleFormat::FLOAT;
diff --git a/src/storage/plugins/UdisksStorage.cxx b/src/storage/plugins/UdisksStorage.cxx
index 844d1d5dc..773b1ff8a 100644
--- a/src/storage/plugins/UdisksStorage.cxx
+++ b/src/storage/plugins/UdisksStorage.cxx
@@ -22,6 +22,7 @@
 #include "storage/StoragePlugin.hxx"
 #include "storage/StorageInterface.hxx"
 #include "storage/FileInfo.hxx"
+#include "lib/fmt/ExceptionFormatter.hxx"
 #include "lib/dbus/Glue.hxx"
 #include "lib/dbus/AsyncRequest.hxx"
 #include "lib/dbus/Message.hxx"
@@ -35,12 +36,15 @@
 #include "event/Call.hxx"
 #include "event/InjectEvent.hxx"
 #include "fs/AllocatedPath.hxx"
+#include "util/Domain.hxx"
 #include "util/StringCompare.hxx"
 #include "util/RuntimeError.hxx"
 #include "Log.hxx"
 
 #include <stdexcept>
 
+static constexpr Domain udisks_domain("udisks");
+
 class UdisksStorage final : public Storage {
 	const std::string base_uri;
 	const std::string id;
@@ -87,9 +91,9 @@ public:
 		try {
 			UnmountWait();
 		} catch (...) {
-			FormatError(std::current_exception(),
-				    "Failed to unmount '%s'",
-				    base_uri.c_str());
+			FmtError(udisks_domain,
+				 "Failed to unmount '{}': {}",
+				 base_uri, std::current_exception());
 		}
 	}