_{Demo using the catppuccin-mocha theme}

Features

• Browse and preview Analyzer4D data files directly in your terminal
• Customizable table columns and sorting
• Multiple plot marker styles with configurable downsampling
• Flexible file filtering with glob and regex patterns
• Theming support

Installation

Install Spectr as a standalone tool using uv:

uv tool install spectr

Or run it directly without installing:

uvx spectr --help

Usage

By default, Spectr scans the current working directory recursively for files matching Analyzer4D's standard naming conventions:

spectr

To scan a specific directory:

spectr --path /path/to/data

To use custom file patterns:

spectr --glob-pattern "*.dat" --regex-pattern "your_pattern"

Note: Scanning directories with many files may take some time.

Configuration

Spectr uses a TOML configuration file located at ~/.config/spectr/config.toml.

Example Configuration

[table]
columns = ["process", "compression_time", "compression_frq", "avg_time", "avg_frq"]
build_batch_size = 1000

[table.sort]
attribute = "process"
order = "ASC"  # or "DESC"

[plot]
marker = "braille"           # options: "braille", "fhd", "hd", "dot"
displayed_datapoints = 1000
downsampling = "lttb"        # options: "lttb", "max_bucket"

[stats]
attributes = [
  "project_id", "directory_path", "filename", "process", "channel",
  "datamode", "datakind", "datatype", "process_time", "process_date_time",
  "db_header_size", "bytes_per_sample", "db_count", "full_blocks",
  "db_size", "db_sample_count", "frq_bands", "db_spec_count",
  "compression_frq", "compression_time", "avg_time", "avg_frq",
  "spec_duration", "frq_start", "frq_end", "frq_per_band",
  "sample_count", "spec_count", "adc_type", "bit_resolution",
  "fft_log_shift", "streamno", "preamp_gain", "analyzer_version", "partnumber"
]

[metadata_cache]
sync_recursive = true   # currently unused
persist_cache = false

[display]
filesize_unit = "binary"    # options: "binary", "decimal"

All table.columns and stats.attributes values correspond to attributes from the qass.tools.analyzer.buffer_metadata.BufferMetadata object.

Contributing

Contributions are welcome! The current focus is on improving core features—preview, filtering, and copying—to make them more user-friendly and robust. If you have ideas for improving the user experience, please open an issue.

Roadmap

• Async or paginated table creation (large query results currently cause temporary unresponsiveness)
• Improved copy screen UX
  • Text input for path entry
  • Preselect current working directory in directory tree
  • Async conflict calculation
• Persist selected theme

License

GNU Lesser General Public License v3.0

Acknowledgments

Built on top of qass-tools-analyzer by QASS GmbH, which provides the core functionality for reading and organizing Analyzer4D files.